Question

genotype refers to the letters used as symbols for the genes. phenotype refers to the appearance. in mendels crosses, round (r) was dominant and wrinkled (r) was recessive. 1) what is the phenotype of each of the following?

genotype	phenotype
rr
rr

Explanation:

To determine the phenotype, we use the given information that round (R) is dominant and wrinkled (r) is recessive. A dominant allele (R) will express the dominant phenotype (round) even if only one copy is present (in heterozygous, Rr) or two copies (homozygous dominant, RR). The recessive phenotype (wrinkled) is only expressed when there are two recessive alleles (rr).

For RR: Since R is dominant and there are two dominant alleles, the phenotype is round.
For Rr: There is one dominant (R) and one recessive (r) allele. The dominant allele is expressed, so the phenotype is round.
For rr: There are two recessive alleles, so the recessive phenotype (wrinkled) is expressed.

Answer:

Genotype	Phenotype
Rr	Round
rr	Wrinkled