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Which of these traits is controlled by a gene with multiple alleles?
All alleles on the X chromosome are dominant.
XY
smile dimples
two alleles of a single gene
both genes and environmental factors
to prove that sex-linked traits are caused by codominant alleles
height is controlled by at least four genes.
blood type
Which of these human traits is altered by variations in environment?
All alleles on the X chromosome are dominant.
XY
smile dimples
two alleles of a single gene
both genes and environmental factors
to prove that sex-linked traits are caused by codominant alleles
height is controlled by at least four genes.
blood type
Why does height in humans have such a wide variety of phenotypes?
All alleles on the X chromosome are dominant.
XY
smile dimples
two alleles of a single gene
both genes and environmental factors
to prove that sex-linked traits are caused by codominant alleles
height is controlled by at least four genes.
blood type
What factors can affect a person’s height?
All alleles on the X chromosome are dominant.
XY
smile dimples
two alleles of a single gene
both genes and environmental factors
to prove that sex-linked traits are caused by codominant alleles
height is controlled by at least four genes.
blood type
Why are sex-linked traits more common in males than in females?
All alleles on the X chromosome are dominant.
XY
smile dimples
two alleles of a single gene
both genes and environmental factors
to prove that sex-linked traits are caused by codominant alleles
height is controlled by at least four genes.
blood type
Why are sex-linked traits more common in males than in females?
All alleles on the X chromosome are dominant.
XY
smile dimples
two alleles of a single gene
both genes and environmental factors
to prove that sex-linked traits are caused by codominant alleles
height is controlled by at least four genes.
blood type
Which combination of sex chromosomes results in a male human being?
All alleles on the X chromosome are dominant.
XY
smile dimples
two alleles of a single gene
both genes and environmental factors
to prove that sex-linked traits are caused by codominant alleles
height is controlled by at least four genes.
blood type
What controls variations in skin color among humans?
All alleles on the X chromosome are dominant.
XY
smile dimples
two alleles of a single gene
both genes and environmental factors
to prove that sex-linked traits are caused by codominant alleles
height is controlled by at least four genes.
blood type
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