Question

Round seeds and yellow seed color are dominant to wrinkled seeds and green seed color. What is the probability of having offspring that have wrinkled seeds and yellow seed color for the cross RRYY ´ RrYy?

Answer 1

All offspring F1 will be dominant for Round seeds ,there will be no recessive wrinkled. Try punnett square to be sure.

Answer 2

The probability of having offspring that have wrinkled seeds and yellow seed color for the cross RRYY ´ RrYy is zero

Step-by-step explanation:

Given

Round see (R) is dominant to wrinkled seed (r)

While Yellow seed (Y) is dominant to green seed (y)

Now a cross is carried out between RRYY * RrYy, the following offspring are produced

RRYY * RrYy

The gametes of RRYY are RY, RY, RY, RY

The gametes of RrYy are RY, Ry, rY, ry

RY Ry rY ry

RY RRYY RRYy RrYY RrYy

RY RRYY RRYy RrYY RrYy

RY RRYY RRYy RrYY RrYy

RY RRYY RRYy RrYY RrYy

Genotype Ratio

RRYY: RRYy: RrYY: RrYy

4:4:4:4

1:1:1:1

Phenotype

All are round and yellow

The probability of having offspring that have wrinkled seeds and yellow seed color for the cross RRYY ´ RrYy is zero