Question

1. a pink snapdragon is crossed with a red. what percent of the offspring can be predicted to have white flowers?
2. roan color in cattle is controlled by codominant genes for both red (r) and white (w) hair. if a roan cow is crossed with a white bull, what percent of the offspring would be white?
3. a woman with type ab blood marries a man with type o blood. what are the possible blood types of their children?
4. a woman with heterozygous type a blood (i^a i) marries a man with type ab blood (i^a i^b). their children could have all of the following blood types except which of the following?

Explanation:

Question 7

Step1: Recall snapdragon flower color inheritance (incomplete dominance). Pink is \( Rr \), red is \( RR \).

Cross: \( Rr \times RR \)
Gametes from \( Rr \): \( R, r \); from \( RR \): \( R, R \)

Step2: Create Punnett square. Offspring genotypes: \( RR, RR, Rr, Rr \). Phenotypes: red (RR) and pink (Rr). No white (\( rr \)) possible.

Step1: Roan cow genotype \( RW \), white bull \( WW \).

Cross: \( RW \times WW \)
Gametes from \( RW \): \( R, W \); from \( WW \): \( W, W \)

Step2: Punnett square. Offspring genotypes: \( RW, RW, WW, WW \). Phenotypes: roan (RW) and white (WW). 2 out of 4 (50%) are white.

Step1: Woman (AB) has gametes \( I^A, I^B \); man (O) has gametes \( i, i \).

Step2: Cross \( I^A/i \) and \( I^B/i \). Offspring genotypes: \( I^A i \) (Type A), \( I^B i \) (Type B).

Answer:

0%

Question 8