Question

The formation of ova, or female reproductive cells, occurs when diploid germ cells undergo meiosis. In female swamp wallabies (Wallabia bicolor), diploid germ cells contain 101010 chromosomes.

At the beginning of meiosis I, a female wallaby germ cells contains
Choose 1 answer:

(Choice A)
A
10 homologous pairs of chromosomes comprising a total of 20 chromatids

(Choice B)
B
5 homologous pairs of chromosomes comprising a total of 20 chromatids

(Choice C)
C
10 homologous pairs of chromosomes comprising a total of 10 chromatids

(Choice D)
D
5 homologous pairs of chromosomes comprising a total of 10 chromatids

Answer 1

(Choice B) 5 homologous pairs of chromosomes comprising a total of 20 chromatids.

Explanation:

Homologous chromosome are those two chromosomes which have same gene but different in shape and appearance.

Chromatids are the identical copies of chromosome. Single chromosome splits into double number of chromatids. In 5 pairs, 10 chromosomes are present so 10 chromosomes splits into 20 chromatids.