Question

Suppose the two possible alleles for the height gene are tall and short. If short is recessive to tall, provide the symbol representation and the phenotype for each of the genotype for this trait.

Answer 1

The allele for short is tt

The phenotype is short and genotype is tt

Explanation:

In Mendelian Genetics, Tall is dominant so written in upper case so the allele will be TT, while the short will have recessive trait allele will be tt.

TT ( dominant tall)

tt  (recessive short)

short progeny will always have tt alleles and the phenotypic trait of shortness will appear only when the carrier is homozygous tt.

the three possible alleles for both short and tall feature are:

TT, Tt, tt

The genotype is tt and phenotype is short height. One heterozygous possibility is Tt but T being dominant so 't'will not be expressed.