Some fruit flies have curly wings instead of normal wings (see the pictures below). Answer the questions using the letter R for normal wings and r for curly wings:
normal wings curly wings
a. Which is the dominant allele? Give the letter and the characteristic.
b. Which is the recessive allele? Give the letter and the characteristic.
c. What is the genotype of a fruit fly that is homozygous for curly wings?
d. Which two genotypes will result in the ‘normal wings’ phenotype?
e. Can a fruit fly with curly wings have a heterozygous genotype? Explain your thinking.
Slide 12 - Slide
CALCULATE THE CHANCE.
Check out the steps on page 136.
Let's practice! A guinea pig is homozygous for blue fur. This guinea pig mates with a guinea pig with yellow fur. Use a punnet square to determine the probability of one of their offspring having blue fur.