2/20 Which of the following genotypes is homozygous dominant? yu YY yY Yu

## Step 1<br />In genetics, a genotype refers to the genetic makeup of an organism. It is the set of genes that an organism carries. <br /><br />## Step 2<br />A homozygous dominant genotype is one where an individual has two copies of the same dominant allele. <br /><br />## Step 3<br />In the given options, the genotype "YY" is homozygous dominant because it has two copies of the same dominant allele, "Y". <br /><br />## Step 4<br />The other options, "yy", "yY", and "Yu", are not homozygous dominant. "yy" is homozygous recessive, "yY" is heterozygous, and "Yu" is not a standard representation of a genotype.