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Sex-Linked Traits And Pedigrees
Test Description: Genetics
Instructions: Answer all questions to get your test result.
1) Which combination of sex chromosomes results in a male?
A
YY
B
XY
C
XX
D
either XX or YY
2) Sex linked genes are on
A
X chromosome only
B
X and Y chromosomes
C
all chromosomes
D
Y chromosome only
3) Hemophilia is caused by
A
recessive allele on the X chromosome
B
dominant allele
C
recessive allele on the Y chromosome
D
extra chromosome
4) Which genetic disorder results in abnormally shaped blood cells
A
Down Syndrome
B
Cystic Fibrosis
C
Sickle-Cell Anemia
D
Hemophilia
5) A carrier is a person who has
A
2 recessive alleles for a trait
B
more than 2 alleles for a trait
C
one recessive and one dominate allele for a trait
D
2 dominant alleles for a trait
6) Factors that control traits are
A
recessive
B
homozygous
C
genes
D
purebred
7) Why do sex-linked traits appear more often in males than in females
A
Any allele on the Y chromosome will be codominant with the matching allele on the X chromosome
B
All alleles on the X chromosome are dominant
C
All alleles on the Y chromosome are recessive
D
A recessive allele on the X chromosome will always produce the trait in a male
8) Why do geneticists use pedigrees?
A
to prove that sex linked traits are caused by codominant alleles
B
to made genetic crosses
C
to trace inheritance of specific traits in a family
D
to replicate strings of DNA
9) On a pedigree chart, a half shaded circle indicates what?
A
male carrier
B
female with a disease
C
female carrier
D
normal female
10) On a pedigree chart, a white square indicates what.
A
male with a disease
B
normal female
C
male carrier
D
normal male
*select an answer for all questions
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