The following genotypes were produced in a cross.
TT and Tt
Identify the parent genotypes for these offspring.
tt and tt
TT and tt
TT and Tt
TT and TT
In order to determine the parent genotypes for the given offspring, we need to understand the principles of inheritance and how alleles are passed on from parents to offspring.
Each individual has two copies of a gene, known as alleles, with one allele inherited from each parent. These alleles can be either dominant (represented by an uppercase letter) or recessive (represented by a lowercase letter).
In the given cross, we have two genotypes: TT and Tt.
From the genotype TT, we can conclude that both alleles are the same. Since uppercase letters represent dominant alleles, this means that both alleles in the parent genotype are dominant.
From the genotype Tt, we can conclude that the two alleles are different. The uppercase T represents the dominant allele, while the lowercase t represents the recessive allele. In this case, the parent genotype consists of one dominant allele and one recessive allele.
Therefore, the parent genotypes for these offspring are TT and Tt, representing the homozygous dominant and heterozygous genotypes, respectively.