Genetics Practice 40

If the dominant trait is having freckles (F) and the recessive trait is no freckles (f), which allele combination(s) below would represent a person who has freckles? (select all that apply)

• FF

• Ff

• ff

What is the phenotype of the offspring? (A-Brown hair; a-blond hair) 

• 50 % Brown Hair and 50% Blond Hair 
• 25 % Brown Hair and 75% Blond Hair 
• 75 % Brown Hair and 25% Blond Hair 
• 0% Brown Hair and 100% Blond Hair 

The combination of genes a person has, represented by letters, is their...

• Genotype

• Phenotype

• Chromosome

• Punnett Square

What belongs in the last box?

• RR

• Rr

• rr

• ff

T - tall and t = short
In the punnett square below, what belongs in the missing square

• tt
• Tt
• Bb
• TT

Look at the punnett square shown. What allele pair would replace the "?"

• WW

• Ww

• ww

Look at the punnett square. What is the probability that the offspring would have homozygous alleles for the trait?

• 100%

• 75%

• 50%

• 25%

• 0%

Both parents in this Punnet square

• are homozygous dominant
• are homozygous recessive
• are heterozygous
• have blue eyes

What is the probability & phenotype of the offspring? (A-Brown hair; a-blond hair)

• 50% Brown Hair and 50% Blond Hair

• 25 % Brown Hair and 75% Blond Hair

• 75 % Brown Hair and 25% Blond Hair

• 0% Brown Hair and 100% Blond Hair

Which of the following is a phenotype?

• Aa
• red hair
• heterozygous
• DNA