Tay - Sachs disease is caused by a recessive allele. What are the chances that a

Question

Tay - Sachs disease is caused by a recessive allele. What are the chances that a couple with one Tay - Sachs child will have another Tay - Such child if they conceive again? Wrinkled seeds is a recessive trait. What is the ratio of wrinkled and round offspring if a hybrid round and a wrinkled pea plant aie crossed? ** Tall is dominant to short. Axial flowers are dominant to terminal flowers. What is the probability of getting a short, terminal pea plant by crossing a purebred tall and purebred axial pea plant with a purebred short and terminal pea plant? **

Explanation / Answer

11. answer : 25% every issue is new and independent event

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12.

R---dominat -----ROUND -------  

     ---r----wrinkle-recessive

Rr      X Rr

RR------25%----round

Rr ------------50%--round

rr------------25%-----------wrinkle

========================================

tall axial    TTAA X    tt aa short and terminal

answe :short and terminal-----0%

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