AP BIOLOGY

Detailed explanation-1: -For example, a test cross between two organisms with the same genotype, Rr, for a heterozygous dominant trait will result in offspring with genotypes: RR, Rr, and rr. In this example, the predicted genotypic ratio is 1:2:1.

Detailed explanation-2: -Individuals carrying two identical alleles (RR or rr) are known as homozygous. While individual organisms bearing different alleles (Rr) are known as heterozygous.

Detailed explanation-3: -Answer and Explanation: If two hybrids are crossed, meaning two heterozygous pink flowers, the chances that the offspring will have pink flowers is 50%. There will also be a 25% chance of a homozygous dominant red flower. Any 25% chance of a homozygous recessive white flower.

Detailed explanation-4: -Answer and Explanation: If the offspring of two heterozygous red-flowering plants are allowed to breed, the cross would result in both red-flowered and white-flowered plants (b). Because the question specifies that R is dominant to r, we can postulate that this gene exhibits a pattern of complete dominance.