Scelta multipla
Which of the following best describes a diploid cell?
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2. Mendel's Laws of Inheritance
Inheritance in Diploids and Haploids
Scelta multipla
In a diploid organism with two alleles (A and a) at a single gene locus, which genotype is homozygous?
A
Aa
B
aA
C
AA
D
A
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Understand the definition of homozygous: an organism is homozygous at a gene locus if it has two identical alleles for that gene.
Identify the alleles given: A and a are the two alleles at the gene locus in this diploid organism.
List the possible genotypes: AA, Aa (or aA, which is the same as Aa), and aa.
Determine which genotype has two identical alleles: AA and aa are homozygous, while Aa (or aA) is heterozygous because it has two different alleles.
Conclude that the genotype 'AA' is homozygous because it contains two copies of the same allele 'A'.
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