1) A breeder performed a testcross to find out if his male dog was a purebred...

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Biology

1) A breeder performed a testcross to find out if his male dogwas a purebred black. He got one brown puppy and seven blackpuppies, did he have the purebred? (explain)
What was the genotype of the female dog he used in test cross (BB),(Bb), or (bb)? (explain)

2) Given the description of an inherited disorder (including apedigree) which of the following shows the probable mechanism ofinheritance of this color? (Autosomal recessive, autosomal dominantX-linked recessive, X-linked dominant)
In the example below, determine the possible genotype ofElizabeth Ed
3)The recessive gene for hemophilia is located on X chromosomeso why more males have hemophilia than females?
4)Palomino horses are known to be caused by the interaction oftwo different genes. The allele C in the homozygous conditionproduces a chestnut, or reddish color, horse. The allele c producesa very pale cream color, called cremello, in the homozygouscondition. The palomino color Cc is caused by the interaction ofboth the chestnut and cremello alleles. Which of the followingshows the probable mechanism of inheritance of this color?(autosomal recessive, autosomal dominant, X-linked recessive,co-dominant, incomplete dominant)

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4.3 Ratings (647 Votes)

1 The ratio of black puppies to brown puppy is 7 1 It is very close to getting a 90 black offspring This indicates that he did have the purebreed since crossing a pure breed black BB with a purebree brown bb will give a 100 black puppies BB Brown Male x bb Brown Female Bb See Answer

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