GENETICS TEST 24-25

How should you show the allele from a dominant trait?

• With an uppercase letter
• With a lowercase letter

How should you show the allele from a recessive trait?

• With an uppercase letter
• With a lowercase letter

In clams, rough shell is dominant to smooth shell. How should you represent the ALLELE for rough shell using the rules we went over in the notes?

• r
• S
• s
• R

In clams, rough shell is dominant to smooth shell. How should you represent the ALLELE for smooth shell?

• r
• S
• s
• R

In clams, rough shell is dominant to smooth shell. How should you represent the GENOTYPE for a smooth shelled clam?

• rr
• r
• ss
• R

In clams, rough shell is dominant to smooth shell. How should you represent the GENOTYPE for a homozygous rough shelled clam?

• rr
• R
• ss
• RR

In clams, rough shell is dominant to smooth shell. How should you represent the GENOTYPE for heterozygous clam?

• Rs
• Rr
• Ss
• RR

In clams, rough shell is dominant to smooth shell. Cross a heterozygous clam with a smooth shelled clam. What are the GENOTYPES possible in the offspring from this cross? Show work on scratch paper

• 50% Rr and 50% rr
• 100% Rr
• 50% Rr and 50% RR
• 100% rr

In clams, rough shell is dominant to smooth shell. In a cross between a heterozygous clam and a smooth shelled clam what are the PHENOTYPES of the PARENTS?

• Both are smooth shell
• Both are rough shell
• 1 is rough shell and 1 is smooth shell
• Not enough information to answer

In clams, rough shell is dominant to smooth shell. In a cross between a heterozygous clam and a smooth shelled clam what are the PHENOTYPES of the OFFSPRING? Show work on scratch paper

• All rough shell
• All smooth Shell
• 50% rough shell and 50% smooth shell
• 75% rough shell and 25% smooth shell