HMB265H1 Final: Study notes for lecture 7

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redtermite204

18 Apr 2011

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HMB265H1 Full Course Notes

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Linked assortment: traits segregate together in progeny: independent assortment: traits segregate independently. 2 linked genes: ex. cross square-red and round-green. Chromosome theory of mendelian inheritance: boveri and w. sutton n: haploid number, in humans, n = 23. Homologous chromosomes: homologous metacentric chromosomes, homologous acrocentric chromosomes, centromere, sister chromatids, nonsister chromatids: The postulates: fertilized eggs receive only gametes, gametes contain hereditary information, sperm and eggs contain one copy of 1n chromosomes. meiosis: fertilized egg"s chromosomes consist of one maternal copy and one paternal copy. mendel"s law of segregation: during meiosis, each chromosome pair goes to opposite poles independently. mendel"s law of segregation and of independent assortment. Evidence from sex chromosomes: cross xx and xy. Fertilization: hereditary information determining sex located on chromosomes. Cross red and white: f1 red www. notesolution. com. Lecture 07: sex-linked traits and chromosomal theory of inheritance: f2 red and white in 3:1. White gene located on x chromosome: xwxw, xwy.

Related Questions

Which of the following statements is accurate (select all that apply)

A	Haploid individuals can be heterozygous.
B	Two homologous chromosomes have identical copies of the same genes.
C	Mendel's law of segregation refers the separation of homologous chromosomes during meiosis.
D	During independent assortment, sister chromatids separate from each other.
E	Phenotype refers to the genetics make up of an individual.

fuchsiaswan22

1. only one chromosome of a homologous pair is present in a cell

2. sister chromatids seperate

3. homologous chromosomes pair up

4. parent cell and daughter cells are genetically identical to each other

5. chromosomes replicate before nuclear division

6. crossing over

7. involved in growth and repair

8. homologous chromosomes separate

9. synthesis of sister chromatids before division

10. independent assortment

Answer Choices:

A. occurs ONLY in meiosis

B. occurs in BOTH mitosis and meiosis

C. occurs ONLY in mitosis

harlequineel895

3)During Metaphase I of meiosis, microtubules called spindle fibers attach to the

	homologous pairs of each chromosome
	non-homologous pairs of each chromosome
	non-sister chromatids of each chromosome
	chiasmata of each chromosome
	centrosome of each chromosome

4)Which meiotic process generates genetic diversity?

	Independent assortment
	Transcription
	Mitosis
	Translation

5)Crossing over:

	Occurs between two homologous chromosomes in Meiosis
	Occurs only in Mitosis
	Can occur in Mitosis and Meiosis
	Involves the exchange of DNA between two chromosomes
	Involvs the exchange of centromeres between two chromosomes

HMB265H1 Final: Study notes for lecture 7

HMB265H1 Full Course Notes

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