AP BIOLOGY

CELL DIVISION

THE CELL CYCLE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
In sexual reproduction, chromosome reduction is necessary to ____
A
ensure that all offspring have the correct diploid number of chromosomes
B
ensure that all offspring have the correct haploid number of chromosomes
C
ensure that all daughter cells are identical
Explanation: 

Detailed explanation-1: -Meiosis is important because it ensures that all organisms produced via sexual reproduction contain the correct number of chromosomes. Meiosis also produces genetic variation by way of the process of recombination.

Detailed explanation-2: -Meiosis ensures haploid phase generation, while fertilization restores the diploid phase. Meiosis is the process through which sexually reproducing organisms maintain their particular chromosomal numbers from generation to generation.

Detailed explanation-3: -Meiosis makes sperm and eggs At conception, an egg cell and a sperm cell combine to form a zygote (46 chromosomes or 23 pairs). This is the 1st cell of a new individual. The halving of the number of chromosomes in gametes ensures that zygotes have the same number of chromosomes from one generation to the next.

Detailed explanation-4: -This reduction is significant because a cell with a haploid number of chromosomes can fuse with another haploid cell during sexual reproduction and restore the original, diploid number of chromosomes to the new individual.

Detailed explanation-5: -The reduction of chromosome number in meiosis is a central event in the lives of most eukaryotes, including humans. It makes diploidy possible because the gametes that are produced with half the chromosome number of their parent cells can then fuse to form a diploid zygote.

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