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WorksheetsPatterns of Inheritance Practice II -- Sex-Linked Traits
Total questions: 10
Worksheet time: 17mins
Humans have ___________ chromosomes (total) inside all somatic cells, arranged in ___________ pairs.
23; 46
46; 23
22; 44
44; 22
Humans have ___________ chromosomes inside all sex cells (sperm and egg cells).
46
11.5
23
2
_______________ are chromosomes that do NOT determine the sex (gender) of the individual.
Autosomes
Gametes
Alleles
X & Y
An individual is considered genetically female if their genotype is _________________.
XX
XY
XYY
YY
An individual is considered genetically male if their genotype is __________________.
XX
XY
XXY
YY
Hemophilia is an X-linked (sex-linked) recessive trait. If a normal male (XHY) and a carrier female (XHXh) have children, what percentage could inherit the disorder?
0%
25%
50%
75%
Based on question 6, of the affected offspring, what percentage are male? Female?
50% chance for male children; 0% chance for female
100% chance for male children; 0% chance for female
0% chance for male children; 50% chance for female
0% chance for male children; 100% chance for female
Colorblindness is an X-linked (sex-linked) recessive trait. What are the chances that a colorblind male and a carrier female will have colorblind children?
25%
50%
75%
100%
Using the information from question #8, what are the chances (out of 4) of having a colorblind daughter?
0
1
2
4
Sex-linked traits are more likely to appear in males than in females because (choose one):
the traits are linked to X-chromosomes, which are not present in females.
the traits are linked to X-chromosomes, which males have only one copy of.
the traits are linked to Y-chromosomes, which are not present in females.
the traits are linked to Y-chromosomes which males have only one copy of.
