Question

Please Help! Question Below!

Answer 1

The wing color of a certain species of moth is controlled by alleles at a single locus. Gray (G) is dominant to white (g). A scientist studied a large population of these moths, tracking the frequency of the G allele over time, as shown in the figure below.

Answer 2

Assuming that the population was in Hardy-Weinberg equilibrium for this gene, what percentage of the moth population was homozygous recessive (gg) in 1975?

Answer 3

A) 25%
B) 36%
C) 64%
D) 75%

Answer 4

@amistre64 @Nnesha @Compassionate @mathmate

Answer 5

define: Hardy-Weinberg equilibrium

Answer 6

p + q = 1?

Answer 7

I think the answer is C by the way.

Answer 8

the wiki defines it as:

allele and genotype frequencies in a population will remain constant from generation to generation in the absence of other evolutionary influences.

Answer 9

Okay

Answer 10

that simply means that the ratio remains consistent .... how to apply that i dont know yet, need to scour the google some more

Answer 11

Okay please do. I really need this :D

Answer 12

ok, i see the p+q=1 in that

f(AA) = p^2
f(aa) = q^2
f(Aa) = 2pq

which are the terms of the expansion of: (p+q)^2 = 1

Answer 13

Okay I understand so far.

Answer 14

Gg is a geno type?

G and g are alleles?

or how do we define those words?

Answer 15

Yes that is how we define it in my class as well.

Answer 16

im trying to determine how we go from a frequency an allele of G, to determining a genotype of (gg)

Answer 17

a pundit square is like

G g
G GG Gg
g Gg gg


g g
G Gg Gg
g gg gg


g g
G Gg Gg
G Gg Gg

Answer 18

Yes

Answer 19

So would my answer be correct?

Answer 20

i cannot verify your answer, i simply do not have enough experience with this stuff to confirm or deny it.

it 'seems' like a good answer; but can you back up its reasoning? even then, i cant verify it.

Answer 21

Okay thank you so much! @amistre64

Answer 22

good luck with it

Answer 23

i wonder
\[(G+g)^2=1\]
\[GG+2Gg+\underbrace{gg}_{\text{solution ?}}=1\]

Answer 24

if G is between .4 and .5

g is between .5 and .6

gg, or g^2, is between .25 and .36

but of course both of those extremes are solution options, and i dont see an option between them so this idea might not hold any value

Answer 25

http://www.k-state.edu/parasitology/biology198/answers1.html

ok, the idea is good ... at least according to this