AP BIOLOGY

CELL DIVISION

MEIOSIS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
At fertilization, what happens to the sex cells?
A
They retain half of their chromosomes.
B
half of the cells copy their DNA twice.
C
their nuclei fuse to from one nucleus.
D
one becomes an egg, and one becomes a sperm cell.
Explanation: 

Detailed explanation-1: -Through fertilization, the egg and sperm are saved: the egg is activated to begin its developmental program, and the haploid nuclei of the two gametes come together to form the genome of a new diploid organism.

Detailed explanation-2: -If a sperm cell fertilizes an egg cell, the nuclei of the two cells combine. A new cell with a complete set of genetic information is produced – one half is from the mother, and the other half is from the father. The fertilized egg cell can now start developing into a baby.

Detailed explanation-3: -The process in which the male sex cell fuses with the female sex cell is called fertilisation.

Detailed explanation-4: -fertilization, union of a sperm nucleus, of paternal origin, with an egg nucleus, of maternal origin, to form the primary nucleus of an embryo.

Detailed explanation-5: -Fertilization is a multistep process that culminates in the fusion of sperm and egg, thus marking the beginning of a new organism in sexually reproducing species.

There is 1 question to complete.