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What are multiple alleles?
three or more chromosomes that determine a trait
height is controlled by at least four genes.
two alleles of a single gene
smile dimples
a chart that tracks which members of a family have a particular trait
both genes and environmental factors
blood type
XY
Which of these human traits is altered by variations in environment?
three or more chromosomes that determine a trait
height is controlled by at least four genes.
two alleles of a single gene
smile dimples
a chart that tracks which members of a family have a particular trait
both genes and environmental factors
blood type
XY
What controls variations in skin color among humans?
three or more chromosomes that determine a trait
height is controlled by at least four genes.
two alleles of a single gene
smile dimples
a chart that tracks which members of a family have a particular trait
both genes and environmental factors
blood type
XY
What factors can affect a person’s height?
three or more chromosomes that determine a trait
height is controlled by at least four genes.
two alleles of a single gene
smile dimples
a chart that tracks which members of a family have a particular trait
both genes and environmental factors
blood type
XY
Which of these traits is controlled by a gene with multiple alleles?
three or more chromosomes that determine a trait
height is controlled by at least four genes.
two alleles of a single gene
smile dimples
a chart that tracks which members of a family have a particular trait
both genes and environmental factors
blood type
XY
What is a pedigree?
three or more chromosomes that determine a trait
height is controlled by at least four genes.
two alleles of a single gene
smile dimples
a chart that tracks which members of a family have a particular trait
both genes and environmental factors
blood type
XY
Why does height in humans have such a wide variety of phenotypes?
three or more chromosomes that determine a trait
height is controlled by at least four genes.
two alleles of a single gene
smile dimples
a chart that tracks which members of a family have a particular trait
both genes and environmental factors
blood type
XY
Which combination of sex chromosomes results in a male human being?
three or more chromosomes that determine a trait
height is controlled by at least four genes.
two alleles of a single gene
smile dimples
a chart that tracks which members of a family have a particular trait
both genes and environmental factors
blood type
XY
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