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ppcehbrown ppcehbrown
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8 years ago Edited: 8 years ago, ppcehbrown
Duchenne muscular dystrophy is an X-linked recessive trait. The following pedigree shows the occurrence of this disorder in an extended family. Provide the phenotypes and genotypes of all the individuals in the pedigree. Enter phenotypes as affected, or normal. Enter gentoypes as XD (for not affected), Xd (for affected) or Y (for male). You may enter these gentotypes as XDXd, XdXd, XDXD and XdY or XDY.

I-1 phenotype is ____ I-1 genotype is ____
I-2 phenotype is ____ I-2 genotype is ____
II-1 phenotype is ____ II-1 genotype is ____
II-2 phenotype is ____ II-2 genotype is ____
II-3 phenotype is ____ II-3 genotype is ____
II-4 phenotype is ____ II-4 genotype is_____
III-1 phenotype is ____ III-1 genotype is ____
III-2 phenotype is ____ III-2 genotype is _____
III-3 phenotype is ____ III-3 genotype is _____
III-4 phenotype is ____ III-4 genotype is _____
Post Merge: 8 years ago

Still need some help with this question please
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wrote...
Valued Member
Educator
8 years ago
I have shown all the genotypes Slight Smile

I hope you can decode the phenotypes too.

Let me know if you need more help.
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wrote...
7 years ago
I have shown all the genotypes Slight Smile

I hope you can decode the phenotypes too.

Let me know if you need more help.

For the genotype.... for I-1 what would the answer be? It's a little confusing on how you wrote it
wrote...
7 years ago
I have shown all the genotypes Slight Smile

I hope you can decode the phenotypes too.

Let me know if you need more help.

This doesn't seem right to me. If a male has the recessive trait at all shouldn't he be affected? For example I-2 should be XD Y not Xd Y?Neutral Face d being the recessive trait. Could use some help on this.
wrote...
Staff Member
6 years ago
Any updates on this?
- Master of Science in Biology
- Bachelor of Science
wrote...
5 years ago
thanks
wrote...
3 years ago
Thanks
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