Sex-Linked Traits And Pedigrees Question Preview (ID: 40762)


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On a pedigree chart, a half shaded circle indicates what?
a) female with a disease
b) female carrier
c) normal female
d) male carrier

Why do geneticists use pedigrees?
a) to trace inheritance of specific traits in a family
b) to made genetic crosses
c) to prove that sex linked traits are caused by codominant alleles
d) to replicate strings of DNA

Why do sex-linked traits appear more often in males than in females
a) A recessive allele on the X chromosome will always produce the trait in a male
b) All alleles on the X chromosome are dominant
c) Any allele on the Y chromosome will be codominant with the matching allele on the X chromosome
d) All alleles on the Y chromosome are recessive

A carrier is a person who has
a) one recessive and one dominate allele for a trait
b) more than 2 alleles for a trait
c) 2 dominant alleles for a trait
d) 2 recessive alleles for a trait

Factors that control traits are
a) genes
b) recessive
c) purebred
d) homozygous

Hemophilia is caused by
a) extra chromosome
b) dominant allele
c) recessive allele on the Y chromosome
d) recessive allele on the X chromosome

Which genetic disorder results in abnormally shaped blood cells
a) Down Syndrome
b) Hemophilia
c) Sickle-Cell Anemia
d) Cystic Fibrosis

Sex linked genes are on
a) all chromosomes
b) X chromosome only
c) Y chromosome only
d) X and Y chromosomes

Which combination of sex chromosomes results in a male?
a) XX
b) XY
c) YY
d) either XX or YY

On a pedigree chart, a white square indicates what.
a) male with a disease
b) male carrier
c) normal male
d) normal female

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