Question

question 3 of 50
for a type of cat, short whiskers are dominant (s) and long whiskers are recessive (s). the punnett square below shows a cross between two cats. what is the phenotype ratio for this cross?
a. 0 short, 4 long
b. 2 short, 2 long
c. 3 short, 1 long
d. 4 short, 0 long

Explanation:

Step1: Determine the phenotype of each genotype

• Genotype \(SS\): Short whiskers (because \(S\) is dominant).
• Genotype \(Ss\): Short whiskers (because \(S\) is dominant).
• Genotype \(ss\): Long whiskers (because \(s\) is recessive).

Step2: Count the number of each phenotype

• \(SS\) appears 1 time.
• \(Ss\) appears 2 times.
• \(ss\) appears 1 time.
• Total number of short - whiskered cats (\(SS + Ss\)): \(1 + 2=3\).
• Total number of long - whiskered cats (\(ss\)): \(1\).

So the phenotype ratio is 3 short : 1 long.

Answer:

C. 3 short, 1 long