Question

1. what is the probability that two lizards that are heterozygous for stripes on their tails (ss) will produce an offspring that is homozygous for no stripes (ss)? a. 100% b. 75% c. 50% d. 25% e. 0%

Explanation:

Step1: Set up Punnett - square

We have two heterozygous lizards with genotype Ss. The possible gametes from each lizard are S and s.

Step2: Fill in Punnett - square

	S	s
s	Ss	ss

Step3: Calculate probability

There are 4 possible genotypes in the offspring. The genotype ss is 1 out of 4. So the probability is $\frac{1}{4}=0.25$ or 25%.

Answer:

d. 25%