10) Somatic cells of Drosophila simulans have a diploid chromosome number of 8. Drosophila are unusual among animals in that crossing over during meiosis does not occur in males. What is the probability that a sperm cell from a male contains replicas of only those chromosomes the male received from his female parent?

Meiosis from a diploid cell comprises four genetically distinct chromosomes (egg cells or sperm cells). A diploid cell contains an entire collection of chromosomal pairs. That pair contains a single parent chromosome. These chromosome pairs are not the same or are homologous (equivalent) clusters, as they contain numerous gene loci.  

For example:- One specific place.

Explanation:

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

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