Biology The Dynamics of Life, Florida Edition

Section 2: When Heredity Follows Different Rules

When Heredity Follows Different Rules

1.
__________ cause the phenotypes of both homozygotes to be produced in heterozygous individuals. SC.F.2.4.2
A)Environmental influences
B)Codominant alleles
C)mutations
D)Incomplete dominances
2.
Which of these statements is true? SC.F.2.4.2
A)Premature balding is a dominant gene in human males and females.
B)Traits for human skin color are governed by only one gene.
C)The color of a peacock's feathers is always the same as the color of a peahen's feathers.
D)Temperature plays a role in the color of the fur of the arctic fox.
3.
Traits that are controlled by genes found on the sex chromosomes are __________. SC.F.2.4.2
A)heterozygous
B)sex-linked traits
C)polygenic inheritance
D)autosomes
4.
Which of these statements is NOT true? SC.F.2.4.2
A)If you are a female, your 23rd pair of chromosomes are XX.
B)Homologous autosomes look alike.
C)Human males produce two kinds of gametes, called X and Y.
D)The 23rd pair of chromosomes are exactly the same in human males and females.
5.
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According to the Punnett square, what are the chances that a human offspring will be male or female? SC.F.2.4.1, SC.F.2.4.2
A)25%
B)50%
C)75%
D)100%
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