Based on the described phenotype, determine the genotype(s). In humans tongue rolling is dominant to not being able to roll the tongue. Which genotypels.would produc offsprings that can roll their tongue? tt Tt TT

## Step 1<br />In this problem, we are dealing with a classic example of Mendelian genetics, where a single gene with two alleles is responsible for a particular trait. The trait in question is the ability to roll one's tongue, which is dominant over the inability to roll one's tongue.<br /><br />## Step 2<br />The dominant allele is represented by 'T', which stands for the ability to roll one's tongue. The recessive allele is represented by 't', which stands for the inability to roll one's tongue.<br /><br />## Step 3<br />According to the principles of Mendelian genetics, an individual with at least one dominant allele (T) will be able to roll their tongue. This means that both TT (homozygous dominant) and Tt (heterozygous) genotypes will result in the phenotype of being able to roll one's tongue.<br /><br />## Step 4<br />The genotype 'tt' (homozygous recessive) would result in the phenotype of not being able to roll one's tongue, as it contains no dominant alleles.