Suppose a population is carrying a condition controlled by two alleles a(dominant) and a (recessive). only homozygous indiviuals that have two copies of the recessive allele have condition. if the a allele has a frequency of 20% and the allele has a frequency of 80% what percentage of the population will have the condition

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.

i hope this : )

not necessarily. higher fitness requires the organism to be reproductive successful. for example, an organism at age 10 with 15 offspring is much more fit than an organism at age 15 with only 5 offspring.