Geneticists use a shorthand notation to refer to the genotyp

Geneticists use a shorthand notation to refer to the genotype of the different individuals with which they are working. For instance, the symbol denoting the recessive allele for the ability to roll your tongue might be written TR^R. An individual that is heterozygous for this trait and also carries the wild-type allele might be denoted as ______. Note: Select all correct answers.

+/TR^R      

TR⁺/TR^R

TR^R/TR^R

+/+

TR⁺/TR⁺

Solution

b). TR⁺/TR^R

Heterozygotes contain one recessive and one dominant allele.. Given that TR^R indicates recessive phenotype, thus, assuming that TR+ as wild-type phenotype, the heterozygous genotype is indicates as, TR⁺/TR^R