AP BIOLOGY

THE CELL

CELL COMMUNICATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
If a body cell in a butterfly contains 24 chromosomes, a butterfly egg would contain
A
48
B
24
C
12
Explanation: 

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

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: -Hence it is called a reductional division. Thus, if a cell has 24 chromosomes before division, the number of chromosomes in the daughter cells produced from mitotic division would remain the same i.e., 24 and the number of chromosomes in the daughter cells resulting from meiosis will be 12.

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