MS 22/23 Final Exam

A person with Huntington’s disease has the genotype Hh. This person is __________________ for this trait. 

• Homozygous (HO) dominant

• Homozygous (HO) recessive

• Heterozygous

 A person that cannot taste the chemical PTC has the genotype tt. This person is __________ for this trait. 

• Homozygous (HO) dominant

• Homozygous (HO) recessive

• Heterozygous

Gregor Mendel studied the inheritance of traits in _________

• Daffodils

• Roses

• Pea plants

 A person whose genes are aa

• Must be dominant

• Has a straight hairline

• Has a peaked hairline

If Jessica has light eyes (bb) but both of her parents have dark eyes (Bb), which statement is true?

• Jessica inherited both genes from her father

• Jessica inherited both genes from her mother

• Jessica inherited one recessive gene from each parent

A chicken with a feather “beard” has the genotype BB. This chicken is ___________________ for this trait. 

• Homozygous dominant

• Homozygous recessive

• Heterozygous

What is this chart used to determine

• The possibility of having twins

• How many offspring parents will have

• The possibiity of traits passed on from parents to offspring (children)

A homozygous black Guinea pig was crossed with a homozygous white Guinea pig and all of the offspring were black. This means that black fur is mostly what type of trait

• Dominant

• Recessive

• Hidden

In chickens, rose comb (R) is dominant to single comb (r).

What is the phenotype of this chicken RR

• Rose comb

• Single Comb

• None of the above

In chickens, rose comb (R) is dominant to single comb (r).

What is the phenotype of this chicken rr

• Rose comb

• Single Comb

• None of the above