10 Questions
In human pedigrees, which characteristic indicates autosomal dominant inheritance?
Males and females are equally likely to be affected
What characteristic of recessive traits in pedigrees makes them difficult to recognize?
Affected individuals can be the children of two unaffected carriers
Why is Huntington’s disease inherited as a dominant allele?
Every affected person has at least one affected parent
What is a key aspect of pedigrees with dominant traits?
Unaffected family members do not transmit the phenotype to their children
What characteristic distinguishes autosomal dominant inheritance from autosomal recessive inheritance?
The phenotype appears in every generation, each affected person having an affected parent
What is the molecular explanation for the shape of wrinkled peas in Mendel's experiment?
The R allele encodes Starch branching enzyme (Sbe1), while the r allele does not produce Sbe1, leading to the accumulation of sucrose and unbranched starch.
What is the molecular explanation for the color of green peas in Mendel's experiment?
The Y allele encodes the Stay green enzyme (Sgr), while the y allele does not produce Sgr, leading to the retention of chlorophyll.
Which enzyme is responsible for breaking down chlorophyll in peas?
Stay green enzyme (Sgr)
What happens when a recessive allele is present according to one of the general molecular principles mentioned?
It usually does not encode a functional protein.
What is the effect of the R allele in Mendel's experiment?
It encodes Starch branching enzyme (Sbe1).
Test your knowledge of molecular genetics with questions about the molecular explanation for Mendel’s pea shape and other related topics from the course BMED 342 SPRING 2024 Molecular Genetics, Techonlogies and Tools by Muhammad Farooq Rai, PhD.
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