Assume that plant height and flower size in Four O\'Clock plants display antogon
ID: 191919 • Letter: A
Question
Assume that plant height and flower size in Four O'Clock plants display antogonistic phenotypes. Four O'Clock plants can be tall or short and the flowers can be large or small. Assume each trait is governed by alleles of a single gene and that each follows Mendel’s first and second laws. You start with two pure breeding strains, one that is tall with large flowers and a second that is short with small flowers. You cross these two strains to each other to generate F1 plants. You self-cross an F1 plant and grow 342 of the resulting seeds into plants. You find that 195 plants are short with large flowers, 62 plants are short with small flowers, 59 plants are tall with large flowers, and 26 plants are tall with small flowers.
If the A gene governs plant height and the B gene governs flower size, which of the following genotypes would correspond to plants that are short with large flowers? (Select 'Yes' or 'No' for each)
Yes No AAbb
Yes No AABB
Yes No AABb
Yes No AaBb
Yes No aabb
Yes No aaBb
Yes No aaBB
Yes No AaBB
Yes No Aabb
Explanation / Answer
AAbb - No (short, small)
AABB - No (short, large)
AABb - No (short, large)
AaBb - No (short, large)
aabb - No (tall, small)
aaBb - Yes (tall, large)
aaBB - Yes (tall, large)
AaBB - No (short, large)
Aabb - No (short, small)