Question

7. In pea plants, inflated pods (R) are dominant to constricted pods (r). Which ofthe following shows a cross between heterozygous inflated pods andconstricted pods?A. RR x RrB. Rr x rrC. RR x rr

Answer 1

GIVEN:

Dominant allele = R = This allele masks the other trait if paired together (in heterozygous individuals).

Recessive allele = r = This trait will be expressed if paired with another recessive allele.

Needs to know: Heterozygous inflated pods and constricted pods

The heterozygous inflated pods individual as suggested by the word 'heterozygous' means this individual has one dominant allele and one recessive allele or Rr.

The constricted pods individual means it has a pair of recessive alleles or rr.

ANSWER: Therefore, the cross is B. Rr x rr.