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## Related Questions

###### Asked in Science, Biology, Genetics

### A fly has two alleles for the color of its eyes The green allele is recessive and is represented by q The blue allele is dominant and is represented by p If 71 of 100 organisms are green what is?

If I understand the question correctly, if about 3 quarters are
green, then that would mean that green is expressed by both
homozygous and heterozygous alleles.
71 of 100 would have a q and either a q or p.
Of the 71 organisms, more or less 25 (give or take) will be qq,
and 50 (give or take) will be qp.

###### Asked in Math and Arithmetic

### What makes a fraction over 100?

n/100 is nice since it can be expressed as a n percent. The goal
is for your fraction p/q, can find out what q must be multiplied by
to get 100 and then multiply that by p also. Many times it will not
be this simple since for starters, q may be >100 then we divide,
or q may not be a divisor of 100 and there are many other
pitfalls.

###### Asked in Genetics

### How calculate the frequency of alleles in population?

Use the Hardy-Weinberg formula for simple two locus alleles. p^2
+ 2pq + q^2 = 1
say you have a population of 100 organisms. 60 of these are
homozygous dominant ( the p ), so 60/100 give the frequency of this
allele, 40/100 give homozygous recessive ( the q ) and the square
root of both times 2 gives the frequency of the heterozygous. All
must equal 1.

###### Asked in Numbers

### Why is 0.18 a rational number?

Any terminating or non-terminating decimal digit is
rational.
The easiest way to look at this is, writing the number in the
fractional from.
0.18 can be written as 18/100.
Now, by the definition of a rational from, 18/100 is of the
standard "p/q" from where q is not equal to 0 (q=100 here).
Thus, it is a rational number.

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