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Which combination of sex chromosomes results in a male human being?
height
XY
A recessive allele on the X chromosome will always produce the trait in a male.
Three or more forms of a gene that code for a single trait
to trace the inheritance of traits over generations of families
Height is controlled by at least four genes.
both genes and environmental factors
A person’s diet
What controls variations in skin color among humans?
height
XY
A recessive allele on the X chromosome will always produce the trait in a male.
Three or more forms of a gene that code for a single trait
to trace the inheritance of traits over generations of families
Height is controlled by at least four genes.
both genes and environmental factors
A person’s diet
Why are sex-linked traits more common in males than in females?
height
XY
A recessive allele on the X chromosome will always produce the trait in a male.
Three or more forms of a gene that code for a single trait
to trace the inheritance of traits over generations of families
Height is controlled by at least four genes.
both genes and environmental factors
A person’s diet
What factors can affect a person’s height?
height
XY
A recessive allele on the X chromosome will always produce the trait in a male.
Three or more forms of a gene that code for a single trait
to trace the inheritance of traits over generations of families
Height is controlled by at least four genes.
both genes and environmental factors
A person’s diet
What are multiple alleles?
height
XY
A recessive allele on the X chromosome will always produce the trait in a male.
Three or more forms of a gene that code for a single trait
to trace the inheritance of traits over generations of families
Height is controlled by at least four genes.
both genes and environmental factors
A person’s diet
Which of these human traits is altered by variations in environment?
height
XY
A recessive allele on the X chromosome will always produce the trait in a male.
Three or more forms of a gene that code for a single trait
to trace the inheritance of traits over generations of families
Height is controlled by at least four genes.
both genes and environmental factors
A person’s diet
How does a geneticist use pedigrees?
height
XY
A recessive allele on the X chromosome will always produce the trait in a male.
Three or more forms of a gene that code for a single trait
to trace the inheritance of traits over generations of families
Height is controlled by at least four genes.
both genes and environmental factors
A person’s diet
Why does height in humans have such a wide variety of phenotypes?
height
XY
A recessive allele on the X chromosome will always produce the trait in a male.
Three or more forms of a gene that code for a single trait
to trace the inheritance of traits over generations of families
Height is controlled by at least four genes.
both genes and environmental factors
A person’s diet
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