Biology Forum › Genetics › Genetics
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- April 21, 2010 at 1:13 am #13164jdg1971Participant
In rabbits, black hair is dominant (B) over brown hair(b). Short hair is dominant(S) over short hair (s). What is the F1 Phenotypic ratio from a cross with a homozygous black long hair rabbit to a brown homozygous short? What is the F2 ratio?
- April 22, 2010 at 3:34 pm #99214simpletonParticipant
you mean short hair is dominant over long hair?
F1 will all be BbSs because BBss x bbSS
F2; you mean backcrossing F1?
If it is, BbSs x BbSs; you get 4 kinds of combination for the gametes, BS, Bs, bS and bs.. just do a dihybrid cross and you can get the answer. - April 22, 2010 at 7:09 pm #99224JackBeanParticipant
what you wrote is not backcrossing, that would be BbSs x BBss and BbSs x bbSS 😉
but I think s/he wanted the cross you wrote. - April 23, 2010 at 9:15 am #99246simpletonParticipant
opps, wrong use of term. 😀 thanks for correcting!
- April 24, 2010 at 10:56 am #99285jwalinParticipant
lol
btw way what is such a cross called…
had it been in plants we refer to it as self pollinated plants but again i think that ainnt the right term for such crosses thats just refering to plant being pollinated by itself but not by even those other plats that have the same genotype atleast for the characteristic under consideration. - April 27, 2010 at 10:46 am #99370simpletonParticipant
haha! let’s call it anyhow-cross!!
biology has got so many terms!!
- April 27, 2010 at 11:01 am #99373JackBeanParticipant
😆
- April 28, 2010 at 12:17 pm #99416jwalinParticipant
lol
thats a nice way to go about thing
simplifying them 😉
simpleton indeed 😆 😉 - May 1, 2010 at 4:27 am #99495simpletonParticipant
hey jwalin,i chanced upon the correct term for F1/F1. it’s called intercross. 🙂
- May 1, 2010 at 9:11 am #99499JackBeanParticipant
maybe it’s name for any croos between organisms with the same genome 😉
- May 1, 2010 at 12:17 pm #99500simpletonParticipant
cause according to "Principles of genetics", it says it is the cross between individuals of same ancestry. 😀
- May 1, 2010 at 12:32 pm #99501JackBeanParticipant
well, that’s something different from what I wrote… but makes sense…
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