CHYS 3P26 Lecture Notes - Lecture 3: Teratology, Toxoplasmosis, Fetal Surgery

76 views5 pages

lavenderbat43

6 Nov 2017

School

Brock University

Department

Child and Youth Studies

Course

CHYS 3P26

Professor

John Mc Namara

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

Document Summary

Father"s sperm + mother"s ovum = zygote with 46 chromosomes in total. The process by which a cell separates chromosomes in its nucleus into two identical. Why do individual differences exist if we come from the same genetic predispositions (siblings) Chromosomes within sperm cells divide in half before they fertilize an ovum or egg cell. Chromosomes with egg cells divide in half before they are fertilized. The randomness creates variation in the resulting embryo. Direct production of amino acids necessary for forming new cells. Guide cells to develop different parts of body. May turn on or turn off other genes. One member from mother, one from father. Both gene are dominant or both recessive. To express a trait one must have a homozygous recessive allele. One gene is dominant and one is recessive. Dominant genes are almost always stronger than recessive genes. Mutation (spontaneous or triggered by prenatal environment)

Related Questions

13. Meiosis differs from mitosis in that:
a. meiosis results in the production of two new cells, whilemitosis results in the production for four new
cells., b. meiosis is used for growth and repair, while mitosis isused for production of eggs and sperm., c.
cytokinesis can be unequal following meiosis, but is approximatelyequal following mitosis., d. meiosis
involves one cell division, while mitosis involves two celldivisions., e. meiosis results in the production of
diploid cells, while mitosis results in the production of haploidcells.
14. Bits of maternal and paternal chromosomes are exchanged betweenhomologous chromosomes during
synapsis of meiosis I. This process is called:
a. crossing over., b. random mating., c. random fertilization., d.random shuffling of parental
chromosomes.,
e. mutation.
15. The advantage of sexual reproduction over asexual reproductionis that:
a. all young are genetically identical to the parent., b. malesmust evolve a copulatory organ., c. genetic
variability in the population is increased., d. females must evolvea vagina., e. mates are not needed.
16. Many different types of information are used to constructphylogenetic trees. Which of the following types
of information is the most direct measure of evolutionaryrelatedness?
a. physiology, b. gene sequence data, c. the fossil record, d.information about the structure of ribosomes.,
e. information about the structure of enzymes
17. A species is:
a. a group of individuals that can interbreed under naturalconditions and produce fertile offspring., b.
denoted by both a genus and a species name., c. the onlybiologically defined taxon., d. a group of
organisms with a large number of traits in common., e. all of theabove.
18. The process of spermatogenesis results in:
A. 4 diploid sperm; B. 1 diploid sperm and 3 haploid polar bodies;C. 1 haploid sperm and 3 haploid
polar bodies; D. 4 haploid sperm
19. Which cell division process results in an unequal division ofthe cytoplasm?
A. Spermatogenesis; B. Testiculargenesis; C. Oogenesis; D. None ofthe above
20. Meiosis is the process by which:
A. 1 diploid cell becomes 4 haploid cells; B. 1 diploid cellbecomes 1 haploid cell and 3 haploid polar
bodies; C. 1 haploid cell becomes 4 diploid cells; D. Both A andB
21. The phase of mitosis where chromosomes line up at the equator(middle) of the cell is called:
A. Anaphase; B. Telophase; C. Interphase; D. Metaphase
22. Chromosome #6 from Mom and Chromosome #6 from Dad form achromosome pair called:
A. Sister Chromatids; B. Centromeres; C. Homologous Chromosomes; D.Spindle Apparatus

scarlethare433

CHYS 3P26 Lecture Notes - Lecture 3: Teratology, Toxoplasmosis, Fetal Surgery

Document Summary

Get access

Related Documents

CHYS 2P35 Lecture Notes - Lecture 4: Functional Analysis, Zygosity, Hypervigilance

CHYS 2P35 Lecture Notes - Lecture 4: Obsessive–Compulsive Disorder, Social Anxiety Disorder, Panic Disorder

CHYS 1F90 Lecture Notes - Haemophilia, Mutation, Developmental Disability

Related Questions