If 23 white, 26 black, and 53 grey coloured offspring resulted from the mating of two grey coloured pigeon birds.
a) what percentage of the offspring from the union of a grey coloured pigeon bird with a white coloured pigeon bird will be white?

b) which statement best describes the genotype of the parents of a grey coloured pigeon bird with a white coloured pigeon bird?

Question

If 23 white, 26 black, and 53 grey coloured offspring resulted from the mating of two grey coloured pigeon birds. 
a) what percentage of the offspring from the union of a grey coloured pigeon bird with a white coloured pigeon bird will be white? 

b) which statement best describes the genotype of the parents of a grey coloured pigeon bird with a white coloured pigeon bird?

anonymous · Answer

I am not positive on how to find the answer to this, but I would think that maybe posting it under the "Mathematics" section would yield more results/responses.

aroub · Answer

But I'm positive it should be posted under the "Biology" section. Thanks :)

abhisar · Answer

Ok, so do you have the idea of incomplete dominance?

aroub · Answer

yes

abhisar · Answer

So we know that the grey color here is due to incomplete dominance. right?

abhisar · Answer

Let the B represent dominant black and b represent recessive white. Then Bb will represent the grey colour pigeon. 


For #1

Grey X White = Bb X bb

abhisar · Answer

Can you perform this monohybrid cross?

aroub · Answer

Bb, Bb, bb, bb

aroub · Answer

50% :)

abhisar · Answer

Yes.
Now how many do you think will be white?

abhisar · Answer

Good :3

aroub · Answer

ohh, that was pretty easy :p

aroub · Answer

don't ask why i have genius as my title xD

abhisar · Answer

You are genius :3

aroub · Answer

well, thanks to you i guess ;)

abhisar · Answer

Ok, so what about the last question?

aroub · Answer

lol was just about to ask you :p

aroub · Answer

ummm

abhisar · Answer

Is that question complete?

aroub · Answer

yes :)

aroub · Answer

usually for the incomplete dominance they use B1B2 x B2B2 or whatever right?

abhisar · Answer

May be .... I used simply Bb :/

aroub · Answer

yeah, i realised that lol 
here are the possible answers: 
A. Bb x bb
B. BB x BB
C. B1B1 x B2B2
D. B1B2 x B1B1
E. B1B2 x B1B2

abhisar · Answer

What do you think?

aroub · Answer

B most probably

aroub · Answer

D*****

aroub · Answer

if it wasn't incomplete dominance, i would've chose A

aroub · Answer

what do you think?

abhisar · Answer

Actually I am sort of confused. I am not able to figure out what the question is asking. Are you sure there is no kind of error ? :/

aroub · Answer

okay, sorry, the question is right, i just didn't write the statements

aroub · Answer

the statements are the choices

aroub · Answer

which statement best describes the genotype of the parents of a grey coloured pigeon bird with a white coloured pigeon bird? 
A. Bb x bb
B. BB x BB
C. B1B1 x B2B2
D. B1B2 x B1B1
E. B1B2 x B1B2

aroub · Answer

better?

aroub · Answer

it's okay tho, i think i got it :)

aroub · Answer

thank you so much!