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WorksheetsModule 10 Lessons 4,5 Quiz
Total questions: 10
Worksheet time: 7mins
Which statement is true of carriers? (There are more than one answer)
They can pass a gene for a recessive disorder.
They express the recessive trait.
They have one dominant allele.
They are heterozygous for a recessive disorder.
What do the roman numerals in the pedigree diagram represent?
Generations in a family
A family
Male or Female
Homozygous alleles
How many of the offspring in this example have the alleles for Tay-Sachs disease?
1
3
0
2
You and your colleagues are constructing a pedigree for a boy with cystic fibrosis. The individual's younger brother has also been diagnosed with cystic fibrosis. How would these brothers be represented in a pedigree?
Both would be represented as completely shaded squares.
Both would be represented as completely shaded circles.
Both would be represented as unshaded squares.
The older brother would be a shaded square, while the younger brother would be a half-shaded square.
Blood type A has a genotype of...
IaIa
ii
IbIb
IaIb
Blood type B has a genotype of...
IaIa
IbIb
ii
IaIb
Blood type O has a genotype of...
IaIa
IbIb
ii
IaIb
Blood type AB has a genotype of...
IaIa
IbIb
ii
IaIb
Why is sickle-cell disease a codominant genetic condition?
both alleles are expressed in the heterozygous condition.
No alleles are expressed in the heterozygous condition.
Both alleles are expressed in the homozygous condition.
An intermediate phenotype is expressed.
Human blood groups are determined by___.
single alleles
multiple alleles
gene linkage
incomplete dominance.
