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WorksheetsPedigrees (autosomal and x-linked)
Total questions: 25
Worksheet time: 49mins
What does a shaded circle represent?
unaffected female
affected female
unaffected male
affected male
Is this pedigree tracking a disorder that is dominant or recessive?
Dominant
Recessive
If this pedigree shows a recessive disorder, what MUST the genotype of generation II individual 2 be?
(individual 4)
HH
Hh
hh
What is the family relationship between the two affected individuals in this pedigree?
Mother and daughter
Grandmother and granddaughter
Aunt and niece
Sisters
What is the genotype for III-3?
(generation 3 individual 3)
GG
Gg
gg
What is the genotype for II-4?
(generation 2 individual 4)
GG
Gg
gg
The pedigree is showing a _____________ trait.
autosomal dominant
autosomal recessive
sex linked recessive
This is a __ trait.
autosomal recessive
sex-linked recessive
autosomal dominant
What is the mode of inheritance shown here?
Sex Linked Recessive
Autosomal Dominant
Autosomal Recessive
What is the mode of inheritance shown here?
Autosomal Recessive
Autosomal Dominant
Sex Linked Recessive
Colorblindness is a recessive X-linked disorder.
Which genotype represents a male with normal vision?
XN YN
Xn Yn
XN Y
Xn Y
Duchenne muscular dystrophy is a recessive X-linked disorder.
According to the Punnett square, what percentage of offspring will have the disorder?
0%
25%
50%
100%
Males are more likely to suffer from a sex-linked disease or disorder because...
males are the weaker sex
males have less DNA
males have 1 X chromosome, so the disorder is more likely to be expressed
females are the stronger sex
Which best explains why individual IV-7 has colorblindness?
Because her mom is a carrier and her dad has the gene
Because her dad has it.
Because her siblings have it.
Because her uncle has it.
Is it possible for individual IV-2 to be a carrier for this autosomal trait? Why?
No, because her parents don't have the trait.
No, because she doesn't have the trait.
Yes, because her siblings have it.
Yes, because her parents are carriers.
Give the genotype for person II-1, for this autosomal trait.
GG
Gg
gg
we cannot be 100% sure of the genotype
