Which two of the following genotypes represent the genotype of a pea plant with yellow coloured and wrinkled seed?
(a) YYr, Yy
(b) YYRr, YRR
(c) yRR, yyRr
(d) YYRR, yyrr
WBBSE
Class X
Life Science
03 (a) Heredity
01 Mark
2023
YYrr or yyRr
Explanation
Seed colour and seed shape in pea plants are controlled by two genes. Yellow seed colour is dominant (Y) over green (y), and round shape (R) is dominant over wrinkled shape (r). For yellow and wrinkled seeds, the genotype must have at least one dominant Y and two recessive r alleles for wrinkled shape. So, YYrr (homozygous yellow, wrinkled) or yyRr (green with one dominant round allele heterozygous with wrinkled) represent these traits.
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