Question

If straight hair (S) is dominant over curly hair (s), can two horses with straight hair produce an offspring with curly hair? Explain your answer.

Answer 1

Answer:

no

Explanation:

straight hair is dominant and two dominant traits create a dominant trait and not a recessive trait

Answer 2

Answer:

No,two horses with straight hair can not produce an offspring with curly hair.There is 0% chance.

Explanation:

Two horses with straight hair can't produce an offspring with curly hair because parents horses don't have any characteristics of curly hair.

Historically, genes are known to be dominant (physically expressed) or recessive (not expressed in DNA but still encoded). For example, brown eyes are considered a dominant trait and blue eyes a recessive trait.

- Since the dominant brown-eyed gene dominates the recessive blue-eyed gene, a fetus with a brown-eyed parent and a blue-eyed parent has the highest chance of having a brown-eyed child.

- However, many genes are more complex in their expression. In the past, geneticists assumed that curly hair was a dominant and recessive gene for straight hair. They now say that hair texture comes through a more complex mix of genes called incomplete dominance.

- Interestingly, it is possible to attribute the curliness of your hair to genetics. The gene that selects for the hair roller phenotype generates a protein that causes curly hair to grow. A person with two recessive alleles has straight hair because the protein that causes the curly phenotype is missing or two non-functional alleles.

- Homozygous individuals with two curly alleles have very curly hair. Somewhere in the middle, heterozygous individuals have a phenotype that people might call "wavy" hair. In a heterozygous organism, only one curly allele is present and only half the amount of protein can be produced. Because of this, the hair is about half as curly as a person with homozygous curls. This is an incomplete dominance pattern.

- A man with heterozygous curly hair is married to a woman with straight hair. The first child has a 50 percent chance of having curly hair because the straight gene is dominant and occurs on the X chromosome.

This is a problem of genetic.

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