Multiple Choice
In basic Mendelian genetics, what genotype represents a homozygous dominant individual for a gene with alleles A and a?
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1. Introduction to Genetics
Fundamentals of Genetics
Multiple Choice
In basic Mendelian genetics, which of the following is an example of an allele (an alternative form of a gene at a specific locus)?
A
A chromosome
B
A gamete such as a sperm cell
C
A phenotype such as yellow seeds
D
(a version of a gene for a trait such as seed color)
Verified step by step guidance1
Understand the definition of an allele: an allele is an alternative form of a gene found at a specific locus (position) on a chromosome.
Identify the options given and analyze each: a chromosome is a structure that contains many genes, not an allele itself.
A gamete (such as a sperm cell) is a reproductive cell that carries alleles but is not an allele itself.
A phenotype (such as yellow seeds) is the observable trait resulting from the expression of alleles, not the allele itself.
Conclude that an allele is a version of a gene, for example, a specific form of the gene controlling seed color, which can be different from other versions (alleles) at the same locus.
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