Which of the following describes a homozygous genotype?

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Q: Which of the following describes a homozygous genotype?

Solution: A homozygous genotype consists of two identical alleles for a trait, either both dominant or both recessive.

Steps: 6

Step 1: Understand what a genotype is. A genotype is the genetic makeup of an organism, specifically the alleles it has for a particular trait.
Step 2: Learn about alleles. Alleles are different forms of a gene. For example, a gene for flower color might have a red allele and a white allele.
Step 3: Know the difference between dominant and recessive alleles. A dominant allele is one that can mask the effect of a recessive allele. If an organism has one dominant and one recessive allele, the dominant trait will be expressed.
Step 4: Define homozygous. A homozygous genotype means that both alleles for a trait are the same.
Step 5: Identify the types of homozygous genotypes. There are two types: homozygous dominant (both alleles are dominant) and homozygous recessive (both alleles are recessive).
Step 6: Conclude that a homozygous genotype consists of two identical alleles for a trait, either both dominant or both recessive.