The hind legs of the frog are adapted for leaping and swimming. They have strong extensor muscles. When these muscles contract, the limbs extend thrusting the foot against the water or land. The frog's forelimbs are shorter and used to steer the frog while swimming and to absorb shock while landing.
A part of the body that doesn’t contain melanin is the nails
Biological or "Darwinian" fitness is being able to live long enough to reproduce and keep the population or species alive.
That would be D. A male with one recessive allele.
Squares represent males and circles represent females. This male has gotten 1 recessive allele from her mom(her genotype is aa because she is expressing the recessive trait).
