In pea plants, yellow peas (coded for by a dominant allele Y) are dominant to green peas (requiring two recessive alleles y). Round peas (coded for by a dominant allele R) are dominant to wrinkly peas (requiring two recessive r alleles).

Question

What is the genotype of a pea with the the phenotype green and round?

(1 point)
Responses

YyRr
YyRr

YYRR
YYRR

yyrr
yyrr

yyRr

Answer 1

A pea plant with the phenotype of green and round has the following characteristics based on the provided information:

• The green pea phenotype requires two recessive alleles (genotype: yy), since yellow (Y) is dominant.
• The round pea phenotype can either be homozygous dominant (RR) or heterozygous (Rr) for the round trait.

However, the question specifies that the pea is green, which means it must carry the yy genotype, and we cannot specify the round part just for the round condition without considering the round phenotype.

Therefore, the genotype for a pea plant that is green and round can be yyRr or yyRR (since we are not given any information about the round genotype).

Among the provided options, yyRr is the only one that correctly represents a green pea (yy) along with the possibility of being round (with R being either Rr or RR).

Hence, the answer is:

yyRr