NEET BIOLOGY

CELL STRUCTURES AND FUNCTION

CELL DIVISION

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

If a normal body cell in a butterfly contains 24 chromosomes, a butterfly egg would contain how many chromosomes?

A	3
B	6
C	12
D	24

Explanation:

Detailed explanation-1: -Therefore, if the meiocyte of an organism has 24 chromosomes, then the gamete will have 12 chromosomes. Q.

Detailed explanation-2: -If the sperm and egg cells of a butterfly have six chromosomes, 12 chromosomes will be there in the maggot larvae. This is because maggot larvae forms due to the fusion of egg and sperm cells. Since egg contains 6 and sperm cells contains 6 chromosomes, maggot larvae will get both sperm cell and egg cell chromosomes.

Detailed explanation-3: -If a cell has 24 chromosomes before cell division then daughter cell resulting from mitotic division will have 24 chromosomes while daughter cell resulting from the meiotic division will contain 12 chromosomes each.

Detailed explanation-4: -Thus, the parent cell with 24 chromosomes after undergoing mitosis will form two daughter cells each with 24 chromosomes.

Detailed explanation-5: -At the G1 stage, the cell has 24 chromosomes. Each chromosome has a single chromatid for a total of 24 chromatids. At the end of the G2 stage, the cell would have already completed replicating its DNA and would still have 24 chromosomes.

There is 1 question to complete.