Answer to Question #128261 in Genetics for marya ahmad

Question

For a non-human organism with somatic cells that have 20 chromosomes, indicate the number of
a. chromatids in the G2 phase.
b. chromosomes during prophase of mitosis.
c. synapsed homologous pairs in metaphase I.
d. chromatids in anaphase of mitosis.
e. telomeres in the G0 phase.

Answer 1

Explanation

Somatic cell 2n = 20

a. Chromatids in G2 phase

Answer : Zero

Explanation:

In G2 phase Chromatin material is present.It is not in chromosomes form.

b. Chromosomes during prophase of mitosis

Answer : 20 chromosomes

Explanation: In prophase chromatin material condenses and form chromosomes.

c .Synapsed homologous pairs in meta phase I

Answer : 10

Explanation: In synapsis homologous chromosomes combine and form a bivalent - a homologous pair of chromosomes.

d. Chromatids in anaphase of mitosis :

Answer: 40 chromatids

Explanation: Each chromosome has two chromatids. 20 x 2 = 40

e. telomeres in the G0 phase

Answer: Zero

Explanation: G0 phase is stage in which cell is in non dividing phase in which chromosomes are present in the form chromatin material.