Curliness of hair follows a codiminant inheritance pattern. Curly hair = C and straight hair = S. A curly hair person mates with a straight haired person. What is the probability of having an offspring with wavy hair?

A)0/4 or 0%
B)1/4 or 25%
C)2/4 or 50%
D)3/4 or 75%
E)4/4 or 100%

To determine the probability of having an offspring with wavy hair, we need to look at the possible combinations of alleles from the parents.

Since curliness of hair follows a codominant inheritance pattern, the possible genotypes of the parents are CC (curly hair) and SS (straight hair). When these two genotypes mate, the possible genotypes of the offspring are CS (wavy hair), CS (wavy hair), CS (wavy hair), and CS (wavy hair).

Out of the four possible genotypes, only one genotype (CS) corresponds to wavy hair. Therefore, the probability of having an offspring with wavy hair is 1 out of 4 possible genotypes, which can be expressed as 1/4 or 25%.

Therefore, the answer is B) 1/4 or 25%.

To determine the probability of having an offspring with wavy hair, we need to consider the possible combinations of alleles from the parents.

Let's use the letters C and S to represent the curly and straight hair alleles, respectively.

The curly-haired person could have the genotype CC (homozygous dominant) or CS (heterozygous). The straight-haired person can only have the genotype SS (homozygous recessive).

When the curly-haired person mates with the straight-haired person, there are four possible combinations of alleles for their offspring: CS, CS, CS, and SS.

Out of these four possibilities, only one of them (CS) results in wavy hair, as it contains both the curly and straight hair alleles.

Therefore, the probability of having an offspring with wavy hair is 1 out of 4, or 1/4, which corresponds to answer option B) 25%.