Multiple Choice
Which of the following best describes the principle of independent assortment in genetics?
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1. Introduction to Genetics
Fundamentals of Genetics
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Alleles are described as ______.
A
different chromosomes within a cell
B
alternative forms of a gene found at the same locus on homologous chromosomes
C
segments of DNA that code for proteins in all species
D
the physical appearance of an organism
Verified step by step guidance1
Understand the definition of an allele in genetics: Alleles are different versions or forms of the same gene that exist at the same position (locus) on homologous chromosomes.
Recall that homologous chromosomes are pairs of chromosomes, one inherited from each parent, that carry the same genes but may have different alleles.
Recognize that alleles are not different chromosomes themselves, but rather variations of a gene located on those chromosomes.
Distinguish alleles from other genetic concepts such as segments of DNA that code for proteins (which are genes) and physical appearance (which is the phenotype resulting from gene expression).
Conclude that the correct description of alleles is 'alternative forms of a gene found at the same locus on homologous chromosomes.'
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