n guinea pigs, black coat color (B) is dominant to white (b). If both heterozygous black guinea pig mated, what are the F1 genotypes and phenotypes?

(Genotype ) - (Phenotype)

BB - black coat

Bb - black coat

bb - white coat

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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