Biology 1001A Lecture Notes - Lecture 4: Homologous Chromosome, Meiosis, Gene Duplication

22 views3 pages

oliveeel203

29 Aug 2016

School

Department

Course

Professor

For unlimited access to Class Notes, a Class+ subscription is required.

Document Summary

Before: the basic mechanism of dna recombination in meiosis. The dna is replicated and homologous chromosomes pair up. The protein structure supports the dna while its sugar-phosphate backbone is cleaved and attached to the other chromosomes". One event of dna recombination includes cleaving of four dna backbones: the stage of meiosis when recombination occurs. Gene duplication allows for a higher chance of the formation of mutations. Which allow for further evolution to occur in the species: products of meiosis in animals vs. plants, fungi and algae. For animals, diploid gametes are produced after meiosis. For plants, diploid cells undergo meiosis to produce haploid spores, which grow via mitosis, and forms the zygote (diploid). Meiosis occurs for a relatively small time in a vertebrate"s life cycle. Eggs are arrested after meiosis i in females until needed meiosis for males is continuous from puberty onward it only starts to occur for males starting from puberty: main differences between meiosis and mitosis.

Related Questions

Question 1

The process by which RNA is synthesized using DNA as a template is â¦

Select one:

a. replication

b. transcription

c. translation

d. inspiration

Question 2

Which of the following occurs during meiosis but not mitosis?

Select one:

a. DNA condenses into chromosomes

b. nuclear envelop disappears

c. homologous chromosomes separate

d. sister chromatids separate

Question 3

Which part of the animal life cycle is haploid?

Select one:

a. gamete

b. zygote

c. sporophyte

d. spore

Question 4

Single celled eukaryotic organisms are â¦

Select one:

a. viruses

b. bacterial

c. archaea

d. protists

Question 5

Which type of cellular division results in the formation of diploid cells from a diploid parent cell?

Select one:

a. mitosis

b. meiosis

c. interphase

d. A and B but not C

e. all of the above

Question 6

A sequence of DNA that codes for a single protein is a â¦

Select one:

a. gene

b. ribosome

c. mRNA

d. none of the above

Question 7

Which of the following is characteristic of animals?

Select one:

a. heterotrophic

b. sexual reproduction

c. embryonic development

d. all of the above

Question 8

All genes have only two possible alleles.

Select one:

True

False

Question 9

The presence of membrane-bound organelles is characteristic of â¦

Select one:

a. prokaryotes

b. viruses

c. bacteria

d. eukaryotes

Question 10

What are the building blocks of proteins?

Select one:

a. fatty acids

b. amino acids

c. nucleic acids

d. all of the above

Question 11

During which phase of the cell cycle does DNA replication occur?

Select one:

a. Mitosis

b. Interphase

c. Meiosis

d. Replicosis

Question 12

Which of the following characteristic is shared among fungi and animals?

Select one:

a. autotrophic

b. heterotrophic

c. cell walls

d. absorb nutrients

Question 13

A error in DNA replication that goes unrepaired is a â¦

Select one:

a. chromosome

b. chromatid

c. mutation

d. none of the above

Question 14

Alternate forms of a gene are called ________.

Select one:

a. chromatids

b. chromosomes

c. ribosomal subunits

d. alleles

Question 15

The physical expression of a genotype is the phenotype.

Select one:

True

False

Question 16

In complete dominance, a heterozygous genotype results in â¦

Select one:

a. a recessive phenotype

b. a dominant phenotype

c. a third and unique phenotype

d. none of the above

Question 17

Which theory explains the evolution of eukaryotes from prokaryotes?

Select one:

a. phagocytosis

b. endosymbiosis

c. pinocytosis

d. none of the above

Question 18

Which scientist experimented with plants to describe patterns of inheritance?

Select one:

a. Mendel

b. Chase

c. Einstein

d. Watson

Question 19

Which cellular organelle contains aerobic cellular respiration?

Select one:

a. chloroplasts

b. mitochondria

c. nucleus

d. lysosome

Question 20

Which of the following statements is false?

Select one:

a. Haploid gametes are formed by meiosis

b. Mitosis forms genetically identical daughter cells

c. Mitosis results in the formation of four daughter cells from a single parent cell

d. Mitosis forms diploid daughter cells from a diploid parent cell

Question 21

The first forms of life on Earth were ________.

Select one:

a. plants

b. microorganisms

c. birds

d. dinosaurs

Question 22

Which of the following is used to separate chromosomes during nuclear division?

Select one:

a. cytoskeleton

b. microtubules

c. actin and myosin

d. amoeboid movement

e. all of the above

Question 23

Which generation is most dominant in more primitive plants?

Select one:

a. bryophyte

b. sporophyte

c. gametophyte

d. androphyte

Question 24

Which of the following is characteristic of plants?

Select one:

a. autotrophic

b. contain chloroplasts

c. multicellular

d. all of the above

Question 25

During which phase of mitosis do chromosome line up along the middle of the cell?

Select one:

a. prophase

b. metaphase

c. anaphase

d. telophase

Question 26

During which phase of mitosis does DNA condense into distinct chromosomes?

Select one:

a. prophase

b. metaphase

c. anaphase

d. telophase

Question 27

The process by which DNA is used as a template to make new DNA is â¦

Select one:

a. translation

b. replication

c. transcription

d. allocation

Question 28

Which of the following is characteristic of plant but not animal cells?

Select one:

a. chloroplasts

b. water vacuole

c. cell wall

d. all of the above

Question 29

Which meiotic division is most like mitosis?

Select one:

a. Meiosis I

b. Meiosis II

c. Meiosis III

d. Meiosis IV

Question 30

Which enzyme catalyzes replication?

Select one:

a. DNA polymerase

b. RNA polymerase

c. Ribosome

d. all of the above

What is a genome? What is a genome made of? Describe the bacterial genome. How do bacteria reproduce? What is binary fission? Distinguish between a chromosome and chromatin. Where are chromosomes located in eukaryotic cells? What is the chromosome made of? What is a centromere? What is the centromere's role? What are sister chromatids and how do they arise? Distinguish between somatic cells and germ (gametes) cells. Describe the cell cycle. What are the different phases? What occurs during S phase? What is interphase? How is the cell cycle controlled?

Describe mitosis. What are the phases of mitosis? What occurs in each of the phases of mitosis? What is cytokinesis? How does this differ between plant and animal cells? What is a kinetochore? Where does it form? What is its role? What is the role of microtubules in mitosis? What is a centriole and what is it composed of? What is a centrosome and what is its role in mitosis? What is the metaphase plate and why is this important? What is the mitotic spindle, its role and its makeup? What defines a diploid cell? How many copies of each chromosome is in a diploid cell? What about a haploid cell? Why do the daughter cells of mitosis always have the same complement of chromosomes?

Describe meiosis. What are the phases of meiosis? What occurs in each of the phases of meiosis? Distinguish between meiosis I and meiosis II and describe how each of these processes compare to mitosis. Why do animal cells undergo meiosis? What is a gamete? What is a zygote? What are recombination, crossing-over, and chiasma? When and why does this occur? What is meant by 'homologous pair of chromosomes'? Why don't the daughter cells of meiosis have the same genetic makeup? What controls the segregation of chromosomes into the gametes?

What are genetic characters? What are genetic traits? What is an allele? What is a locus? How many alleles at each locus would a human cell have and why? Distinguish between genotype and phenotype. What is meant by a dominant gene? What is meant by a recessive gene? How do these differ? What is the genotype of a homozygous dominant organism? What is its phenotype? What is the genotype of a homozygous recessive organism? What is its phenotype? What is the genotype of a heterozygous organism? What is its phenotype? What is a genetic cross? Distinguish between the P, F1, and F2 generations. What is a true-breeding line? What is the genotype and phenotype of a cross between homozygous dominant and homozygous recessive parents? If the F1 progeny are crossed, what would be the genotype and phenotype of the F2 generation? What would be the phenotypic ratio? What would be the genotypic ratio? Be ready to generate Punnet square tests or probability analyses of crosses involving more than one genetic locus. Describe a dihybrid cross where two alleles are homozygous dominant in one parent and homozygous recessive in the other. What would be the phenotypic ratio of the F2 generation from this dihybrid cross? What is meant by independent assortment? Be prepared to calculate probabilities resulting from different crosses.

Distinguish between complete and incomplete dominance. How would incomplete dominance alter the results of a hybrid cross? What would the resulting F2 generation phenotype and genotype ratios be? What is codominance? How does this affect the results of crosses? Be prepared to determine likely blood types of parents based on the blood types of their offspring. What is a polygenic trait? What is a carrier state for a genetic disease? What is meant by linked genes? How does this affect expected outcomes of genetic crosses? How is gene linkage used for chromosomal mapping? Distinguish between autosomes and sex chromosomes. What sex chromosomes are found in women? What sex chromosomes are found in men? What are sex-linked traits? Be prepared to give the results of crosses that involve sex-linked recessive traits. What is the process of nondisjunction? What are the likely results? Why is this important? What is a Barr body? Recognize the genetic abnormality of Downs Syndrome, Turner's Syndrome, and Klinefelter's Syndrome.

pucewallaby221

Please provide correct answer and explanation to the answer,Thank you!

If an enterprising graduate student decided to repeat theHershey-Chase

experiment but neglected to perform the blending portion, wherewill the

isotopes be found?

a. 35S will be found in the supernatant and 32P will be found inthe pellet

b. 32P will be found in the supernatant and 35S will be found inthe pellet

c. Both 32P and 35S will be found in the supernatant

d. Both 32P and 35S will be found in the pellet

e. None of the above are correct
Chargaffï¿½s rules include:

a. The ratio of Aï¿½s + Tï¿½s to Gï¿½s + Cï¿½s is always consistent

b. A=G and T=C

c. Purines/Pyrimidines = 1

d. More than one of the above are true

e. None of the above are true
Sea Urchin DNA contains 18% guanine (which is true); how muchthymine

does it contain?

a. 9%

b. 18%

c. 32%

d. 36%

e. 64%
E. coli DNA contains a little over 25% guanine. If samples weretaken of E.

coli DNA and Sea Urchin DNA and denatured in water baths, whichwould

melt at a lower temperature?

a. E. coli DNA

b. Sea Urchin DNA

c. They would melt at the same temperature

d. There is not enough information to determine the answer

e. DNA doesnï¿½t ï¿½melt,ï¿½ it isnï¿½t ice cream for goodness sake!
If testing the second generation results in tube B, which modelcan we

conclude is correct?

a. Dispersive

b. Semi-conservative

c. Conservative

d. Semi-dispersive

e. We canï¿½t conclude yet, it could still be more than onepossibility
Phosphorus is required to synthesize dNTPs used in DNAreplication. Imagine

you grow E. coli in media containing non-radioactive phosphorusfor many

generations, then switch the E. coli to media containingradioactive

phosphorous (32P). You then sample the E. coli after one roundof replication

for radioactivity. Where will you find radioactive phosphorus inthe DNA?

a. Both strands will contain 32P

b. One strand will contain 32P

c. Neither strand will contain 32P

d. Drats! I knew I should have done suggested problem 12.19!
Which of the following statements about chromosomes are alwaystrue?

I. Non-histone proteins make up about 5% of a eukaryotic

chromosome by weight

II. Histones have a negative charge

III. Prokaryotes have a single linear chromosome

a. Only Statement I is true

b. Only Statement II is true

c. Only Statement III is true

d. More than one of the above statements are true

e. None of the above statements are true
What portion of the human genome is made up of highly repetitiveDNA?

a. Less than 5%

b. 6 ï¿½ 20%

c. 21 ï¿½ 30%

d. 31 ï¿½ 40%

e. Over 40%
Which of the following statements are always true?

I. Histones are very conserved between species

II. Archaea have nuclei

III. Prokaryotes are haploid and eukaryotes are diploid

a. Only Statement I is true

b. Only Statement II is true

c. Only Statement III is true

d. More than one of the above statements are true

e. None of the above statements are true
An individualï¿½s phenotype is a function of:

a. The alleles they carry

b. The environment they live in

c. The interaction between an individuals genes and theenvironment

d. Two of the above are correct

e. All of the above are correct
A homologous pair of chromosomes showing a

crossover are shown to the right for reference. Are all

the sperm from one human male genetically identical?

a. Yes

b. No, variation occurs during mitosis

c. No, variation occurs during meiosis I

d. No, variation occurs during meiosis II

e. No, variation occurs during both meiosis I and II
Production of gametes in humans requires which kind ofdivision?

a. Meiotic and is reductional

b. Mitotic and is reductional

c. Meiotic and is equational

d. Mitotic and is equational

e. None of the above

scarletmallard658

Biology 1001A Lecture Notes - Lecture 4: Homologous Chromosome, Meiosis, Gene Duplication

Document Summary

Get access

Related Documents

Biology 1001A Study Guide - Final Guide: Meiosis, Gene Duplication, Mitosis

Biology 1001A Lecture Notes - Lecture 8: Fetus, Copy-Number Variation, Ploidy

Biology 1001A Lecture Notes - Lecture 4: Monosomy, Trisomy, Nondisjunction

Related Questions