You've discovered a new plant species in which

green fruit color (g) is recessive to yellow fruit color (G), and

long fruit shape (l) is recessive to round fruit shape (L).

The genes for fruit color and shape are located on the same chromosome and are 12 m. u. apart.

Determine the proportions of progeny of each phenotype produced for this cross: Gl/gL x Gl/gL

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.