16 Jun American Public University BIOL 133 – A and Z are independent events
Question
A and Z are independent events. The probability that A occurs is ¼. The probability that Z occurs is ¼. What is the probability that both will occur?
A.1/4
B.1/8
C.1/3
D.1/2
E.1/16
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What statement describes X-linked traits? Select all that apply.
A. Women can be carriers because they can be heterozygous for the trait
B. X-linked traits are more common in men
C. Males are never carriers since they only receive one X chromosome
D. Males inherit X-linked traits from their fathers
E. Women only have to have one affected gene to show the trait
If genes are completely linked, all the offspring will be _________.
A.recombinants
B.hybrids
C.dominant
D.parental
E.recessive
Marfan syndrome is a dominant trait. A cross between a homozygous dominant and a heterozygote would produce what phenotypic ratio?
A.1:2:1
B.3:1
C.2:2
D.1:3
E.4:0
Sickle cell anemia is a recessive trait. A cross between two heterozygotes would produce what phenotypic ratio?
A.1:2:1
B.3:1
C.2:2
D.1:3
E.4:0
Low pitched male voices (RR) and a high pitched male voice (rr). Heterozygotes have a baritone voice. This is an example of _________.
A.incomplete dominance
B.codominance
C.Mendelian genetics (dominance and recessive
D.multiple alleles
The allele for widows peak (H) is dominant for the allele for no widows peak (h). At a different gene locus, the allele for hitchhikers thumb (D) is dominant to the allele for non-hitchhikers thumb (d). A man is heterozygote for the traits and marries a woman who has no widows peak and is heterozygote for hitchhikers thumb. What is the man’s genotype?
A.HHDD
B.HhDd
C.HHdd
D.hhDD
E.hhdd
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