autosomal recessive

[pistolpete007]

---

Members do not see this ad.

i know autosomal recessive mean that only one allele "a" maybe be rpesent but if they are referring to a question as 16% of population is autosomal recessive...do u automatically asssume "aa" and not "a"

also on destroyer it says NO is e-w/drawing but o/p (same as halogens) is this true?

 

[HoangDDS]

i know autosomal recessive mean that only one allele "a" maybe be rpesent but if they are referring to a question as 16% of population is autosomal recessive...do u automatically asssume "aa" and not "a"

also on destroyer it says NO is e-w/drawing but o/p (same as halogens) is this true?

If they say that "allele a has a 16% frequency in the population / the frequency of allele a is 16%" that means that the allele a occurs in 16% percent of the population, even if it is not expressive as in heterozygous individuals. So the total of allele a, in the population can be found on homozgous individuals plus half the heterozgous individuals -- since they are Aa. Let allele a = q. Then the total allele a = q^2 + (1/2) (2pq) x (population).

If they say that "16% of the population is autosomally recessive / 16% of the population have the autosomal recessive disorder" then 16% of the population have to be aa. Therefore aa or q^2 = 16%

It make sense to me, but I can understand that it gets confusing. Feel free to PM if you're still shaky.