One cat carries heterozygous, long-haired traits (Ss), and its mate carries homozygous short-haired traits (ss). Use a Punnett square to determine the probability of one of their offspring having short hair.

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Answer: 2 squares will be ss so there is a probability of 50% being short haired

Explanation:

The probability of one of their offspring having short hair - 50%

The traits are expressed in terms of genes that occur in pairs in either two dominant or recessive or a combination of the two. These combinations are called the genotype of an organism.

  • The trait that can be observed is called the phenotype.
  • There are three main combinations that are dominant, heterozygous, and recessive genotypes
  • There are mainly two phenotypes either dominant trait or recessive trait.
  • In this case, S is the dominant allele of long hair whereas s is the allele for short hair

Cross between: Ss x ss

Gametes: S, s and s, s

Punnett:

          S     s

s      Ss    ss

s       Ss    ss

There are two out of four offspring have short hair.

Thus, probability of one of their offspring having short hair - 50%

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