AP BIOLOGY

Detailed explanation-1: -In pea plants, purple flowers (P) are dominant over white (p) flowers. A cross between two purple pea plants yields approximately 25% of the offspring exhibiting white flowers.

Detailed explanation-2: -Answer and Explanation: In this situation, every offspring produced from this cross with be a heterozygote (Pp), and because purple is dominant to white, all the offspring will be purple. Therefore, the probability of an offspring having white flowers is zero.

Detailed explanation-3: -There was a 3:1 ratio of purple:white flowers in generation F2 because the “masked” (recessive) genes from the F1 generation were allowed to pair, however they were only allowed to pair one time leaving the other three times to appear with purple flowers.

Detailed explanation-4: -Here, it has been given that purple flower color is dominant over the white flower color. Hence, the flower color of a plant that is heterozygous for this trait will be purple. Let P be the dominant allele and p be the recessive allele. i.e, 3/4 or 75% of the offsprings will have purple-colored flowers.