Which of the following chromosomal deletions is/are frequent genetic cause/s of male infertility?
a) autosomes
b) X-chromosomes
c) Y-chromosome
d) all of these
Hairy ears are thought to be……….trait.
a) X-linked
b) Y-linked
c) autosomal
d) all of these
Which of the following possessing one X-linked recessive mutation are considered carriers and will generally not manifest clinical symptoms of the disorder?
a) females
b) males
c) both a and b
d) none of them
Explanation: because female has two X-chromosomes
In X-linked recessive inheritance, all offspring of a carrier female have a ……% chance of inheriting the mutation.
a) 25
b) 50
c) 75
d) 100
In X-linked recessive inheritance, how much percentage of daughters will be carrier for a mutation if the father is affected only?
a) 25
b) 50
c) 75
d) 100
Explanation: because daughters receive one X from father (affected) and one from mother (normal)
In X-linked recessive inheritance, how much percentage of daughters will be affected from disorder for a mutation if the father is affected only?
a) 25
b) 50
c) 75
d) 0
Explanation: because daughters receive one X from father (affected) and one from mother (normal), heterozygous female is carrier of mutation
