How do the punnett squares for a monohybrid cross and a dihybrid cross differ?

(amoeba sisters video recap: pedigrees and need

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.

What would be he the strand of complementary dna produced be the strand of dna shown below> tcg aag