Which issue is considered a “red flag” for the need for referral to a genetics professional?
Family history of asthma in 3rd degree relative
Incorrect
Myocardial infarction in a grandparent at age 72
Incorrect
A sister who had an early first trimester pregnancy loss
Incorrect.
A father with bilateral kidney cancer diagnosed at 35
Correct!
How are Punnett Squares and pedigrees different?
Pedigrees represent genotypes and Punnett Squares represent phenotypes.
Incorrect
Punnett Squares represent genotypes and pedigrees represent phenotypes
Correct!
Pedigrees can identify actual carriers of genetic mutations, whereas Punnett squares only suggest carrier status.
Incorrect
Punnett squares can identify actual carriers of genetic mutations, whereas pedigrees only suggest carrier status.
Incorrect
What is the risk for disease expression among offspring of a woman who has an autosomal recessive disorder when her partner is a carrier for the same disorder?
All sons with be affected; all daughters will be carriers.
Incorrect
All children have a 50% risk for being affected and a 50% risk for being a carrier.
Correct!
Daughters have a 50% risk for being affected; all sons will either be affected or carriers
Incorrect.
Each child of either gender has a 50% risk of being a carrier; a 25% risk of having the disease, and a 25% risk of having not having the disease or being a carrier.
Incorrect
In the pedigree above, what is the likely mode of inheritance?
X-linked recessive
Correct!
Autosomal dominant
Incorrect
Autosomal recessive
Incorrect
Mitochondrial
Incorrect