AP BIOLOGY

HEREDITY

LINKED GENES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Each body cell of a goat contains 60 chromosomes. The number of chromosomes in a goat egg cell, produced by meiosis, will be
A
15
B
30
C
60
D
120
Explanation: 

Detailed explanation-1: -How many chromosomes will be in the cells produced by meiosis II? A goat has 60 chromosomes in a somatic cell. Are the cells produced by meiosis I haploid or diploid? A goat has 60 chromosomes in a somatic cell.

Detailed explanation-2: -Sheep belong to the genus Ovis and have 54 chromosomes, while goats belong to the genus Capra and have 60 chromosomes.

Detailed explanation-3: -At the end of mitosis, the two daughter cells will be exact copies of the original cell. Each daughter cell will have 30 chromosomes. At the end of meiosis II, each cell (i.e., gamete) would have half the original number of chromosomes, that is, 15 chromosomes.

Detailed explanation-4: -Each daughter cell will have half of the original 46 chromosomes, or 23 chromosomes. Each chromosome consists of 2 sister chromatids. The daughter cells now move in to the third and final phase of meiosis: meiosis II. At the end of meiosis I there are two haploid cells.

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