Multiple Choice
What is an organism's genotype?
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13. Mendelian Genetics
Genotype vs. Phenotype
Multiple Choice
In the context of genetics, what does the term 'homozygous genotype' refer to?
A
A genotype that results in a recessive phenotype
B
A genotype with two different alleles for a trait
C
A genotype with two identical alleles for a trait
D
A phenotype that is expressed regardless of genotype
Verified step by step guidance1
Understand the term 'genotype': In genetics, a genotype refers to the genetic makeup of an organism, specifically the alleles present at a particular gene locus.
Define 'allele': An allele is a variant form of a gene. Organisms typically have two alleles for each gene, one inherited from each parent.
Explain 'homozygous genotype': A homozygous genotype occurs when an organism has two identical alleles for a specific trait. This can be either two dominant alleles or two recessive alleles.
Differentiate from 'heterozygous genotype': A heterozygous genotype consists of two different alleles for a trait, one dominant and one recessive.
Clarify the options: The correct definition of a homozygous genotype is 'A genotype with two identical alleles for a trait', distinguishing it from other options that describe phenotypes or heterozygous genotypes.
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