Select all that apply. meiosis maintains chromosome number throughout generations causes genetic recombination is employed in maintenance causes genetic variation regulates environmental effects on the organism

Answer

Explanation;

-Meiosis is a type of cell division which in which cells involved divides into four daughter cells which have half the number of chromosomes as the parent cells.

-Meiosis is important as it results to genetic variation in organisms through the process of cross over, in which genetic materials are exchanged by the homologous chromosomes, where segments of chromosome are exchanged by non-sister chromatids.

-Additionally, meiosis results to genetic recombination as a result of pairing of homologous chromosomes. This takes place when two molecules of DNA exchange their genetic material with one other.

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.