Answer:
a. F1 genotype PpBb
b. F1 phenotype All black offsprings
c. F2 phenotypic ratio: Black 9/16 cream 3/16 albino 4/16
Explanation:
In rats, the allele for pigmentation (P) is dominant to the allele for albinism (p).
The B gene allele for black pigmentation (B) is dominant to the allele for cream pigmentation (b).
cross 1
pure breeding black rat x albino rat homozygous for cream
parent PPBB x ppbb
a. F1 genotype PpBb
b. F1 phenotype All black offsprings
PpBb x PpBb
c. F2 phenotypic ratio: Black 9/16 cream 3/16 albino 4/16
LH and FSH by posterior pituitary while act on mature follicles to undergo ovulation. Estrogen and progesterone by ovaries and act on many things.
The second graph is immigrantion
Creating new, habitable land out of riverbeds
