Molecular Genetics: Mendel's Pea Shape Explanation

Play an AI-generated podcast conversation about this lesson

Which disease exhibits a dominant pattern of inheritance based on the pedigree analysis?

Huntington’s disease (correct)

Sickle cell anemia

Tay-Sachs disease

Cystic fibrosis

Which disease exhibits a recessive pattern of inheritance based on the pedigree analysis?

Marfan syndrome

Cystic fibrosis (correct)

Familial hypercholesterolemia

Neurofibromatosis type I

What is a key aspect of pedigrees with dominant traits?

Affected children always have at least one affected parent (correct)

Dominant traits show a horizontal pattern of inheritance

Dominant traits only affect males

Two affected parents never produce unaffected children

Which single-gene trait caused by a dominant allele has the highest frequency among humans?

Familial hypercholesterolemia Signup and view all the answers

What is the likelihood of an unaffected family member transmitting the phenotype to their children in autosomal dominant inheritance?

Unaffected family members do not transmit the phenotype to their children. Signup and view all the answers

What is a characteristic of diseases with recessive alleles in humans?

They often require both parents to be carriers in order for the offspring to be affected. Signup and view all the answers

What is the molecular explanation for the wrinkled peas in Mendel's pea shape experiment?

The R allele encodes Starch branching enzyme (Sbe1) and the r allele does not make Sbe1, leading to sucrose and unbranched starch build-up. Signup and view all the answers

What is the molecular explanation for the green peas in Mendel's pea color experiment?

The Y allele encodes Stay green enzyme (Sgr) and the y allele does not make Sgr, leading to chlorophyll not being broken down and the peas remaining green. Signup and view all the answers

Based on the general molecular principles, what does a dominant allele usually determine?

A normally functioning protein Signup and view all the answers

According to the general molecular principles, what does a recessive allele usually encode?

A non-functional protein Signup and view all the answers

What happens when the y allele is present in Mendel's pea color experiment?

Chlorophyll is not broken down and the peas remain green Signup and view all the answers

What is the consequence of having the r allele in Mendel's pea shape experiment?

Sucrose and unbranched starch build up, leading to wrinkled peas Signup and view all the answers

What is the molecular explanation for the wrinkled peas in Mendel's experiment?

The R allele encodes Starch branching enzyme (Sbe1), while the r allele does not make Sbe1, leading to build-up of sucrose and unbranched starch, causing wrinkled peas Signup and view all the answers

What is the role of the Y allele in determining pea color in Mendel's experiment?

The Y allele encodes the Stay green enzyme (Sgr), which helps break down chlorophyll, resulting in green peas Signup and view all the answers

Based on the general molecular principles mentioned, what does a dominant allele usually determine?

A normally functioning protein Signup and view all the answers

According to the general molecular principles mentioned, what does a recessive allele usually encode?

A non-functional protein Signup and view all the answers

What happens when the r allele is present in Mendel's experiment?

Sucrose and unbranched starch build up, leading to wrinkled peas Signup and view all the answers

What is the effect of the Y allele in Mendel's experiment?

Chlorophyll breakdown, resulting in green peas Signup and view all the answers

Molecular Genetics: Mendel's Pea Shape Explanation

Choose a study mode

Podcast

Questions and Answers