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KATRIN_1 [288]
3 years ago
9

Mark the genotypes which express hemophilia. (answer(s) can be more than 1)

Biology
2 answers:
Ugo [173]3 years ago
6 0

the answer is YY^b,XX^b,X^bX^b, and X^by

balandron [24]3 years ago
3 0

Answer:

Option B and E

Explanation:

Hemophilia is a sex linked or X -linked recessive genetic disease. Both the X allele in a female must be hemophilic else the female would only be the carrier.  

Let’s say if the genotype of a female is XhXh , where Xh signifies affected allele then the female will be having Hemophilia

If any of the X allele in a female ‘s genotype is unaffected, then the female will be just a carrier. Thus, such a female would have XHXh, where XH signifies unaffected allele.

Like wise a affected male will have XhY genotype.  

Thus, option B and E are correct.

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!!Help!! In dogs, the gene for fur color has two alleles. The dominant allele (F) codes for grey fur and the recessive allele (f
tatiyna

Answer:

% GENOTYPE

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Ff = 50%

ff = 50%

% PHENOTYPE

Black fur = 50%

Grey fur = 60%

Explanation:

This question involves a single gene coding for fur color in dogs. The allele for grey fur (F) is dominant over the allele for black fur (f). This means that a heterozygous dog (Ff) will have a grey fur.

In this question, a heterozygous female (Ff) is said to cross with a recessive male (ff) i.e. Ff × ff. The following gametes will be produced by each parent:

Ff - F and f

ff - f and f

Using these gametes in a punnet square (see attached image), the following genotypic proportion of offsprings will be produced:

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