Chapter 02: Extensions to Mendel’s Laws Genetics Quiz

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What is the term for the phenomenon of a single gene determining several distinct and seemingly unrelated characteristics?

Pleiotropy (correct)

Monomorphism

Heterozygosity

Polymorphism

What is the term for the percentage of the total number of gene copies for one allele in a population?

Monomorphic rate

Allele frequency (correct)

Genetic polymorphism

Mutation rate

In the ABO blood type system, what is a gene with only one common wild-type allele considered to be?

Monomorphic (correct)

Homozygous

Recessive

Polymorphic

What is the term for high-frequency alleles of polymorphic genes that are often referred to as common variants?

Polymorphisms Signup and view all the answers

Which type of allele negatively affects the survival of a homozygote and is known as a recessive lethal allele?

Lethal allele Signup and view all the answers

What type of alleles are the mutant alleles a and at in the context of the mouse agouti gene?

Recessive to A Signup and view all the answers

What happens when mutations occur in gamete-producing cells?

They can be transmitted to offspring Signup and view all the answers

What is the term for the chance alterations of genetic material that arise spontaneously?

Mutations Signup and view all the answers

What is the range of frequency for gametes with mutations?

10 -4 to 10 -6 Signup and view all the answers

What does it mean when a gene is described as polymorphic?

It has more than one common allele Signup and view all the answers

Which of the following statements about ABO blood types is true?

I A and I B are codominant Signup and view all the answers

How many alleles can a gene have according to the text?

More than three alleles Signup and view all the answers

Which statement best describes the HLA genes mentioned in the text?

Each gene has 400-to-1200 alleles each Signup and view all the answers

What is the significance of the ABO blood group system in medical terms?

Antibodies are made against type O sugars Signup and view all the answers

How many genotypes produce four blood phenotypes in the ABO blood group system?

Six genotypes Signup and view all the answers

What does it mean for two alleles to be codominant?

Both alleles contribute to the phenotype when present together Signup and view all the answers

Which blood type individuals are universal donors according to the text?

Type O Signup and view all the answers

What do the A and B alleles in the ABO blood group system represent?

'A' represents A type sugar, 'B' represents B type sugar Signup and view all the answers