Question

Match the following pea phenotypes to their respective genotypes.

• A. Tt
• B. TT
• C. tt

Answer 1

Homozygous refers to having identical alleles for a single trait. Homozygous alleles may be dominant or recessive. A homozygous dominant allele combination contains two dominant alleles and expresses the dominant phenotype. A homozygous recessive allele combination contains two recessive alleles and expresses the recessive phenotype. A heterozygous allele combination contains a dominant allele and a reccessive allele. In this type of combination the recessive allele is masked by the dominant allele. So the dominant phenotype is expressed.