Multiple Choice
The number of different gametes that can be produced in a male, based on independent assortment alone, equals __________.
29. Heredity
Overview of Human Genetics
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When the two alleles controlling a trait are different, the individual is __________ for the trait.
A
homozygous
B
dominant
C
recessive
D
heterozygous
Verified step by step guidance1
Understand the concept of alleles: Alleles are different forms of a gene that are found at the same place on a chromosome. Each individual inherits two alleles for each gene, one from each parent.
Define homozygous: An individual is homozygous for a trait if they have two identical alleles for that trait, either both dominant or both recessive.
Define heterozygous: An individual is heterozygous for a trait if they have two different alleles for that trait, one dominant and one recessive.
Differentiate between dominant and recessive alleles: A dominant allele is one that expresses its trait even if only one copy is present, while a recessive allele only expresses its trait if two copies are present.
Apply the definitions: Since the problem states that the two alleles controlling the trait are different, the individual is heterozygous for the trait.
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