1)Joe’s grandfather (on his mothers side) was a lizard man on a circus sideshow (the result of rare...

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1)Joe’s grandfather (on his mothers side) was a lizard man on a circus sideshow (the result of rare X-linked recessive allele that gave him a tail). Joe meets and marries Julie, whose uncle on her mothers side had a tail removed at the age of 2. Julie is now pregnant with their first child  	Assign genotypes. 	What is the probability that their first child will have a tail? 	If the first child does have a tail, what is the probability that a second child will have a tail?  2) Achondroplasia (dwarfism) is an autosomal dominant disorder, where individuals homozygous for the mutant allele do not survive1) if a woman with achondroplasia marries a man of normal height, what proportion of their offspring is expected have achondroplasia?2) if a woman with achrondroplasia marries a man with achondroplasia , what proportion of their offspring is expected to have achondroplasia?
	
Document Preview: 1)Joe’s grandfather (on his mothers side) was a lizard man on a circus sideshow  (the result of rare X-linked recessive allele that gave him a tail). Joe meets and marries Julie, whose uncle on her mothers side had a tail removed at the age of 2.  Julie is now pregnant with their first childAssign genotypes.What is the probability that their first child will have a tail?If the first child does have a tail, what is the probability that a second child will have a tail?                                              2) Achondroplasia (dwarfism) is an autosomal dominant disorder, where individuals homozygous for the mutant allele do not survive    1) if a woman with achondroplasia marries a man of normal height, what proportion of their offspring is expected have achondroplasia?   2) if a woman with achrondroplasia marries a man with achondroplasia , what proportion of their offspring is expected to have achondroplasia?

Robert · Accepted Answer

1) Joe’s grandfather (on his mother’s side) was a lizard man on a circus sideshow (the 
result of rare X-linked recessive allele that gave him a tail). Joe meets and marries Julie, 
whose uncle on her mother’s side had a tail removed at the age of 2.  Julie is now pregnant 
with their first child. 
1) Assign genotypes. 
2) What is the probability that their first child will have a tail? 
3) If the first child does have a tail, what is the probability that a second child will have a 
tail?                                               
 Since Joe’s grandfather had a tail so, his genotype should be X*Y and Joe’s mother’s 
genotype should be X*X as; she should have received one abnormal X chromosome from her 
father, and one normal X chromosome from her mother.  Now, Joe may contain any one out of 
following genotypes: XY (normal),

1)Joe’s grandfather (on his mothers side) was a lizard man on a circus sideshow (the result of rare X-linked recessive allele that gave him a tail). Joe meets and marries Julie, whose uncle on her...

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