Question

Please help!

A pea plant with round seeds (Rr) is crossbred with another pea plant with wrinkled seeds (rr). What is the probability of offspring having wrinkled seeds?

A) 0%

B) 25%

C)50%

D)75%

Answer 1

If we use cross breeding, then you will have to imagine the punnet square.
So the parents are Rr and rr
so r would be the recessive
and R is the dominant

Let's cross them:
Rr x rr
=Rr Rr rr rr
Rr =50%
rr=%
So the probablity of a wrinkled seed offspring would be 50% (rr).

Answer 2

after crossbreeding, the seeds will be in the form below
Rr, Rr, rr and rr
which is two for each in four possible outcomes bringing the ratio to 1:1
which is equivalent to 1/2
so 1/2 as a percentage is
=1/2*100
=50%