For my biology project on Dwarfism we need to define the genetic cause (i.e. dominant, recessive, sex-linked, codominance, or not known). Does anyone know what it is?? We also have to have a punnet square of a cross between someone with the disorder and a heterozygous individual, if anyone knows how to do that.. feel free to add.
2007-11-08 11:07:03 · 8 answers · asked by livingforthenow 3 in Health ➔ Diseases & Conditions ➔ Other - Diseases
Achondroplasic Dwarfism is caused by a single gene mutation that is about 50% inherited and 50% spontaneous mutation. Families that have no history of Dwarfism have about the same chance of occurence of this condition as do families that have a relative or ancestor who expressed this condition.
It is dominant, and not sex-linked. Individuals that express this trait are heterozygous for the trait, as the homozygous condition is not compatible with life.
I know how to draw a Punnett square but not on this media. You might put normal in the upper left-hand box, heterozygous in the upper right and lower left box, and homozygous-fatal in the lower right box.
The Punnett square is only useful when you are dealing with a factor that is KNOWN to be inherited. Because Achondroplasic Dwarfism can arise by the spontaneous mutation of a single gene when germ cells are dividing, which will result in a child with the condition, it is an ongong concern for all expectant parents.
2007-11-08 11:26:53 · answer #1 · answered by correrafan 7 · 1⤊ 0⤋
Dwarfism Punnett Square
2016-10-16 09:58:48 · answer #2 · answered by yousef 4 · 0⤊ 0⤋
I think you might mean achondroplasia. It's a recessive gene, I don't think it's sex-linked. You might find what you're looking for here:
http://www.geneclinics.org/profiles/achondroplasia/details.html
As for punnett squares..
http://en.wikipedia.org/wiki/Punnett_square
They're not too hard to make, I did them all the time in bio last year. Once you understand what they are & how they work, they're easy to use but they can be tricky at first.
2007-11-08 11:13:14 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Small knob can also cause this. Sorry, I have no idea how to answer your question, and I hope I have not offended anyone with my humour.
2007-11-08 11:11:47 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Short jeans. Sorry, I have no idea how to answer your question, and I hope I have not offended anyone with my humour.
2007-11-08 11:09:56 · answer #5 · answered by Pagan Dan 6 · 0⤊ 0⤋
ummmm true/ 7/ false/ endoplasmic reticulum? Any of the above?
2007-11-08 11:12:01 · answer #6 · answered by hay-hay 2 · 0⤊ 0⤋
it's an inheritable disorder in bone or cartilage development. (bone dysplasias)
2007-11-08 11:11:10 · answer #7 · answered by Helen 3 · 0⤊ 0⤋
Setting your goals to low?
2007-11-08 11:10:41 · answer #8 · answered by Anonymous · 0⤊ 1⤋