Question

question 2
can you curl your tongue up on the sides?
we are pretending that tongue - curling in humans is a dominant genetic trait.
suppose a man who is tt for tongue - curling marries a woman who is also tt for this trait. what are the possible genotypes and phenotypes of their children, and the percent chance for each?

genotype	phenotype (curl or no curl)	percent chance (number only)
tt	______	______
tt	______	______

blank 1:
blank 2:
blank 3:
blank 4:
blank 5:
blank 6:

Explanation:

Step1: Set up Punnett Square

Both parents have genotype \( Tt \). The possible gametes from each parent are \( T \) and \( t \). The Punnett Square is:

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Step2: Analyze Genotypes and Phenotypes

• For \( TT \): Since \( T \) is dominant, phenotype is "curl". From Punnett Square, 1 out of 4, so percent chance is \( \frac{1}{4} \times 100 = 25 \).
• For \( Tt \): Dominant \( T \) is present, phenotype is "curl". 2 out of 4, so percent chance is \( \frac{2}{4} \times 100 = 50 \).
• For \( tt \): No dominant \( T \), phenotype is "no curl". 1 out of 4, so percent chance is \( \frac{1}{4} \times 100 = 25 \).

Answer:

Blank 1: curl
Blank 2: 25
Blank 3: curl
Blank 4: 50
Blank 5: no curl
Blank 6: 25