Meiosis

Question 1

What is meiosis

Answer 1

Results in 4 daughter cells that are haploid ad gen different. Chromosomes in diploid exist in pairs identical in shape and genes containing same characteristics

Question 2

meiotic divisions

Answer 2

1st meiotic div; homo pairs separate and 2 daughter cells form with 23 chromosomes each with 46 chromatids. 2nd meiotic div; chromatids separate resulting in 4 daughter cells with 23 chromosomes

Question 3

Interphase 1

Answer 3

similar to mitosis, dna reps and each duplicated chromosome has 2 identical chromosomes

Question 4

P1

Answer 4

Chromosomes pair off (synapsis), and chromosomes become visible, they gradually move so that members of homo pair lie along side. Homo pairs form tetrad, crossing over.

Question 5

M1

Answer 5

Paired chromosomes move towards spindle fibres at end of p1, arrange on spindles fibres across the equator. Independent assortment occurs.

Question 6

A1

Answer 6

Homo pairs separate, sis chromatids remain at the centromere, 23 to each side, each pole has half of og cell

Question 7

T1

Answer 7

Uncondense, nm reappears and cytokenesis

Question 8

2ND MEIOTIC DIV

Answer 8

Each daughter cell w/ 23 chromosomes does the same thing in which chromatids seperate and migrate to either end. 4 haploid cells

Question 9

Crossing over

Answer 9

During P1, when homo pairs, chromatids cross, break, and exchange segments. The point at which they cross is called chiasma and results in a new como of alleles, aka recombinations