# A-Level biology Hardy Weinberg equation watch

1. If anyone could help me out on these questions and could possibly show how you worked them out thanks )

Around 1 in 17,000 UK people have some form of albinism, a recessive condition.
A) what is the frequency of the dominant allele ?
B) what is the incidence of carriers in the population?
C) if the UK population is taken to be 63 million, how many people will be carriers of an albino allele?

2. Roberts syndrome is a rare recessive autosomal prenatal and postnatal growth disorder. It has an incidence of approximately 1 out of every million births.
A) What is the frequency of the carrier genotype?
B) what percentage of the population do not have the recessive allele in their genotypes?

Sickle cell anaemia occurs in 1/500 African American births but has a prevalence of 2% in West Africa
A) determine the frequency of the carriers in both the USA and West Africa
B) explain the difference between the prevalence of carriers in these related populations
2. Sorry you've not had any responses about this. Are you sure you've posted in the right place? Here's a link to our subject forum which should help get you more responses if you post there.

Just quoting in Amusing Elk so she can move the thread if needed
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3. (Original post by Bethany200016)
If anyone could help me out on these questions and could possibly show how you worked them out thanks )

Around 1 in 17,000 UK people have some form of albinism, a recessive condition.
A) what is the frequency of the dominant allele ?
B) what is the incidence of carriers in the population?
C) if the UK population is taken to be 63 million, how many people will be carriers of an albino allele?

2. Roberts syndrome is a rare recessive autosomal prenatal and postnatal growth disorder. It has an incidence of approximately 1 out of every million births.
A) What is the frequency of the carrier genotype?
B) what percentage of the population do not have the recessive allele in their genotypes?

Sickle cell anaemia occurs in 1/500 African American births but has a prevalence of 2% in West Africa
A) determine the frequency of the carriers in both the USA and West Africa
B) explain the difference between the prevalence of carriers in these related populations
Hey guy, you have to use the Hardy-Weinburg equation to solve this.

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