A male has a genotype RrTt. What is the probability of his producing Rt sperm cells?

Question

A) 0%

B) 25%

C) 50%

D) 100%

Answer 1

B. 25%

i learned how to do problems like this in class. trust me. just use the punnett square.

Answer 2

c?

Answer 3

Yep it is b

In this example, any sperm cell will have either an "R" or "r" and also a "T" or a "t".  The probability of a "R" and a "t" together (ie an Rt sperm) is found using a punnet square

...........R......r

T........RT...rT

t.........Rt.....tr

Given that Rt turns up once (out of 4) in the punnet sqaure above means it has a 25% chance of occurring in the sperm

Answer 4

b definetly

||||||||||||T||||||||||| t |||||||  

R|||||| RT |||||||Rt||||||

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r|||||||||rT|||||||||||rt||||||||

its a punnet (or chi) square