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Multiple Choice
Alternative versions of a gene that produce distinguishable phenotypes are called:
A
Chromatids
B
Loci
C
Genotypes
D
Alleles
Verified step by step guidance
1
Understand the key terms related to genes and genetics: A gene is a segment of DNA that codes for a specific trait.
Recognize that 'chromatids' refer to identical halves of a duplicated chromosome, not different versions of a gene.
Know that 'loci' (singular: locus) are the specific physical locations of genes on a chromosome, not the gene variants themselves.
Understand that 'genotypes' describe the genetic makeup of an organism, specifically the combination of alleles it carries, rather than the alleles themselves.
Identify that 'alleles' are the alternative versions of a gene that can produce distinguishable phenotypes, which is why this is the correct answer.