Qualification > Sciences
ALL CIE BIOLOGY DOUBTS HERE !!!
poisonedrose:
OctNov06- number 2.. How is it done? ._. It seems to be so confusing!
Vampire-Love4ever:
--- Quote from: poisonedrose on May 31, 2011, 08:43:19 pm ---OctNov06- number 2.. How is it done? ._. It seems to be so confusing!
--- End quote ---
Which paper?
Vampire-Love4ever:
IF YOU ARE DOING PAPER 4 (which I'll assume you are :p)
Anyways, I hope you see this- poisonedrose!
See the attachments! (I hope it's clear enough)
Explanation: As the question mentions, a cross between two dogs with copper hair tips always produces copper hair tips- meaning it must be homozygous recessive. As only one allele is being expressed.
A cross with two black dogs will produce off springs SOME with red hair tip & copper hair tip (some black off springs too). Meaning both the parents must be heterozygous.
I am sorry if my explanation isn't clear enough! :$
Re-read the question and I am sure you'll get it!
poisonedrose:
:) you're amazing. Thank you so much.
After reading the question.. 6?7? times, with your explanation, I finally got it.
Time to hit the hay however.
Good luck all of you guys here :)
Vampire-Love4ever:
Welcome! ;) Good luck!
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