Quiz 8

Question 1

What are the 4 possible genotypes resulting from a cross between Rr and rr? It may be helpful to draw out a punnet square

Answer 1

Rr,Rr,rr,rr

Question 2

What term describes the combination of alleles present in a gene?

Answer 2

Genotype

Question 3

What term describes the observable characteristics that are a result of the genotype?

Answer 3

Phenotype

Question 4

What term describes an allele that is only expressed if 2 copies are present?

Answer 4

Recessive

Question 5

What term describes the genotype when 2 alleles present in a gene are the same?

Answer 5

Homozygous

Question 6

What terms describes the genotype when 2 alleles present in a gene are different?

Answer 6

Heterozygous

Question 7

What term describes an allele that is always expressed, even if only one copy is present?

Answer 7

Dominant

Question 8

What is the probability that 2 parents who are heterozygous for a trait have a child who is homozygous recessive for that trait?

Answer 8

0.25

Question 9

What are the four possible genotypes resulting from a cross between RR and rr? It may be helpful to draw out a punnet square

Answer 9

All four genotypes are Rr

Question 10

What are the 4 possible genotypes resulting from a cross between Rr and Rr? It may be helpful to draw out a punnet square

Answer 10

RR,Rr,Rr,rr

Question 11

What term describes different forms of the same gene?

Answer 11

Allele