Textbook Question
If an allele must be present on both the maternal and paternal chromosomes to affect the phenotype, the allele is said to be
(a) Dominant
(b) Recessive
(c) Complementary
(d) Heterozygous
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29. Heredity
Overview of Human Genetics
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Alternative forms of genes are called __________.
A
autosomes
B
alleles
C
phenotypes
D
genomes
E
karyotypes
Verified step by step guidance1
Understand that genes are segments of DNA that code for proteins and determine traits.
Recognize that alternative forms of a gene that arise by mutation and are found at the same place on a chromosome are called alleles.
Differentiate between the given options: autosomes are non-sex chromosomes, phenotypes are observable traits, genomes are the complete set of genes, and karyotypes are the number and appearance of chromosomes.
Identify that alleles are the correct term for alternative forms of a gene.
Conclude that the correct answer to the problem is 'alleles', as they represent the different versions of a gene that can exist at a specific locus.
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