Straight Hair Is Dominant To Curly

Of course that means that your mother s hair is closer to wavy than curly. It has been long established that curly hair is a dominant trait in caucasians and straight hair is recessive. In this case when curly hair h is dominant over straight hair h a man with straight hair has the genotype hh.

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Straight hair is dominant to curly. Dedicated knowledgeable experienced friendly tutor. The only way to get curly hair is if both. In contrast if a person expresses a dominant trait they can be homozygous or. Woman with curly.

Possible genotype and phenotype for kids. This would account for the distribution in your siblings as one would expect statistically that there would be 3 cs and 1 ss. This means that curly hair is usually passed on from parents to offspring but sometimes the curls fail to manifest as predicted. If a person with curly hair marries a person with straight hair their kids would have wavy hair.

A woman with curly hair marries a man who is homozygous for straight hair. This is for biology. Since they are the only two alleles we know that they must add up to 100 which is 1. This means two things.

Curly hair h. Yes curly hair is dominant. However a single gene has yet to be found to be solely responsible for the curly or straight hair trait in caucasians. Straight hair is dominant to curly hair.

For each phenotype list the genotypes straight hair is dominant to curly use the letter of the dominant trait straight. Hair type is an interesting case of something called incomplete dominance. Cc will give curly hair but cs will give wavy hair since c is incompletely dominant the phenotype or what you see will be in between curly and straight. So most likely your mother s genes are cs and your father s ss.

Curly hair and straight hair have incomplete dominance. So for hair texture p is the frequency of the straight hair allele and q is the frequency of the curly hair allele. 1 if a person carries one allele for curly hair and another for straight hair this person will have curly hair. Recessive cc straight h.

2 curly hair is a simple trait and is most likely determined by one single gene. How curly is a different question. So for hair type cc gives curly cs gives wavy and ss gives straight hair. When people say that curly hair is the result of a single dominant gene the theory mendelian genetics which is supposed to apply at the population level has been incorrectly applied to individual genes.

What this means is that with hair type if you have one of each version of the gene you get a mix of the two or wavy hair. There are two versions of the hair type gene curly c and straight s.