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Why are sex-linked traits more common in males than in females?
a chart that tracks which members of a family have a particular trait
A recessive allele on the X chromosome will always produce the trait in a male.
A person’s diet
height
to trace the inheritance of traits over generations of families
Blood Type
Three or more forms of a gene that code for a single trait
Height is controlled by at least four genes.
What are multiple alleles?
a chart that tracks which members of a family have a particular trait
A recessive allele on the X chromosome will always produce the trait in a male.
A person’s diet
height
to trace the inheritance of traits over generations of families
Blood Type
Three or more forms of a gene that code for a single trait
Height is controlled by at least four genes.
What controls variations in skin color among humans?
a chart that tracks which members of a family have a particular trait
A recessive allele on the X chromosome will always produce the trait in a male.
A person’s diet
height
to trace the inheritance of traits over generations of families
Blood Type
Three or more forms of a gene that code for a single trait
Height is controlled by at least four genes.
How does a geneticist use pedigrees?
a chart that tracks which members of a family have a particular trait
A recessive allele on the X chromosome will always produce the trait in a male.
A person’s diet
height
to trace the inheritance of traits over generations of families
Blood Type
Three or more forms of a gene that code for a single trait
Height is controlled by at least four genes.
What is a pedigree?
a chart that tracks which members of a family have a particular trait
A recessive allele on the X chromosome will always produce the trait in a male.
A person’s diet
height
to trace the inheritance of traits over generations of families
Blood Type
Three or more forms of a gene that code for a single trait
Height is controlled by at least four genes.
Which of these traits is controlled by a gene with multiple alleles?
a chart that tracks which members of a family have a particular trait
A recessive allele on the X chromosome will always produce the trait in a male.
A person’s diet
height
to trace the inheritance of traits over generations of families
Blood Type
Three or more forms of a gene that code for a single trait
Height is controlled by at least four genes.
Which of these human traits is altered by variations in environment?
a chart that tracks which members of a family have a particular trait
A recessive allele on the X chromosome will always produce the trait in a male.
A person’s diet
height
to trace the inheritance of traits over generations of families
Blood Type
Three or more forms of a gene that code for a single trait
Height is controlled by at least four genes.
Why does height in humans have such a wide variety of phenotypes?
a chart that tracks which members of a family have a particular trait
A recessive allele on the X chromosome will always produce the trait in a male.
A person’s diet
height
to trace the inheritance of traits over generations of families
Blood Type
Three or more forms of a gene that code for a single trait
Height is controlled by at least four genes.
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