Biology Forums - Study Force

Biology-Related Homework Help General Biology Topic started by: ILoveBIO30 on Sep 28, 2015



Title: Blood Type Question about Offspring and Married Couple and Gene Question
Post by: ILoveBIO30 on Sep 28, 2015
1. If a man has type AB blood and a woman has type A blood, what possible blood types could their children have? Give all of the phenotypes and their expected percentages

2.Consider the following hypothetical case: in some birds, a dominant gene is lethal. When a homozygous dominant gene is lethal, a heterozygous condition results in short and crooked wings, and a bird that is homozygous reccessive is normal in wing structure.

What is the phenotype ratio if two heterozygous short and crooked-wing birds were crossed?

a. 1:1
b. 1:2:1
c. 2:1
d. 3:1


Title: Re: Blood Type Question about Offspring and Married Couple and Gene Question
Post by: habiba on Sep 28, 2015
1. If a man has type AB blood and a woman has type A blood, what possible blood types could their children have? Give all of the phenotypes and their expected percentages

Blood type Punnett squares are done just like other Punnett squares. if the man is type AB, then his genotype is AB; he produces A and B gametes. If the woman is type A, then her genotype is either AA or Ai. In the first case, she produces A gametes; in the second, she produces A and i gametes. So, there are two possible Punnett squares: AB x AA, in which case the children would have either type A or type AB blood, and AB x Ai, in which case the children could have.any blood type except O.

If a baby has type AB, and the mother is type B, the father must have type A or type AB. He must supply an A allele...


Title: Re: Blood Type Question about Offspring and Married Couple and Gene Question
Post by: ILoveBIO30 on Oct 2, 2015
Thanks!!! But can you tell me the percentages? and what are phenotypes?
Post Merge: 8 years ago

and do you know the answer to the second question?


Title: Re: Blood Type Question about Offspring and Married Couple and Gene Question
Post by: bio_man on Oct 17, 2015
Hello ILoveBIO30,

Could you update us on the solutions to these two questions?

Thanks