What is the probability that a cross between a heterozygous dominant yellow-seeded pea plant and a green-
seeded pea plant will produce green-seeded offspring?

1:1

1:2

1:4

1:8

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.