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Lecture 18

BIOL 1201 Lecture Notes - Lecture 18: Wild Type, Cytokinesis, UracilPremium

Biological Sciences
Course Code
BIOL 1201
Moroney, James

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Biol 1201- Lecture 18- Genetics
**Clicker Questions**
What is the result when diploid cells undergo mitosis? 2 diploid cells
What is the result when a diploid cell undergoes meiosis? 4 haploid cells
Your gametes are the result of meiosis
The stage of the cell cycle that occurs immediately after DNA synthesis is: G2
Crosses with Pea Flowers
oMale stamens (produce pollen) and female carpels (produce ovules)
oAfter fertilization, zygotes produced in the ovules become seeds (peas)
oFig 14.1 & 14.2 & 14.3
Mendel’s Law of Segregation
Alternative versions of genes (alleles)
Offspring inherit one allele from each parent. The dominant allele is fully expressed
A parent’s alleles segregate during gamate production
Phenotype: physical appearance
Genotype: the genetic makeup; what alleles an individual contains
Homozygous: genotype consists of duplicates of the alleles (dominant or recessive)
Heterozygous: genotype consists of two different alleles
FIG 14.5
Test Cross
Determine the genotype of an individual with a dominant phenotype
Review for Test 3
Where would one find rRNA in the cell? b
Which of the following is true about the structure of DNA? e
A typical mRNA found in the cytoplasm of a eukaryotic cell will have all of the following features
A human cell contains 44 autosomes, an X chromosome and a Y chromosome. What is this
The protein-RNA complex responsible for making new proteins is called _______.e
Which statement best describes a homologous pair of chromosomes in your cells? d
What is the result when a diploid cell undergoes mitosis?a
What happens during S phase of the cell cycle? a
A father has blood type O and a mother has blood type AB. Which blood type is NOT
POSSIBLE among their children? c
Taxol, which inhibits the depolymerization of microtubules, is used in chemotherapy to treat
cancer. How does taxol work? c
Dog liver cells have 78 chromosomes. How many chromosomes do dog sperm cells have? b
12. The making of protein is called . translation
13. At what point in mitosis are the chromosomes in the middle of being pulled apart?
Compare the processes of spermatogenesis and oogenesis in humans. Which process takes
longer? oogenesis takes much longer (days or more) than spermatogenesis
Questions 15 - 19 refer to peas. In peas yellow color (Y) is dominant over green color (y). Also
the round pea trait (R) is dominant over the wrinkled trait (r). The genes for pea color and
round/wrinkled peas are unlinked.
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