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Andre45 [30]
3 years ago
13

Huntington's disease is caused by the allele h, which is completely dominant to the normal recessive allele h. consider a couple

where the man has the genotype hh, and the woman has the genotype hh. what is the chance that their child will develop huntington's disease?

Biology
1 answer:
Dahasolnce [82]3 years ago
7 0
Thr genotypes of the parents are Hh heterozygote (the father) and hh recessive homozygote (the mother).
The father has a dominant allele (H) that causes him to develop Huntington disease.
As you can see in the punnet square presented below, he will pass this H allele to a half of his offspring, giving them Huntington's disease too.
So, the possibility of the offspring of this couple having Huntington's disease is 50%.

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Carrot slices placed in a 0.2 M salt solution for several hours become flaccid (limp). Carrot slices placed in fresh water for s
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<h2>Carrot in 0.2M salt solution</h2>

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  2. <em>Freshwater and salt arrangement are both hypotonic</em> to the cells of the carrot cuts.  
  3. Freshwater is isotonic and the salt arrangement is hypertonic to the cells of the carrot cuts.  
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5 0
3 years ago
2. In a certain fish, blue scales (BB) and red scales (bb) are codominant. When a fish has the
Evgen [1.6K]

Upon crossing BB with bb, we will get a hybrid of Bb.

  • Codominance is a phenomena in genetics where two alleles (different forms of the same gene) express themselves equally in an organism. As a result, characteristics linked to each allele are shown at the same time.
  • The MN blood group system in humans is an illustration of codominance. M and N alleles control the MN blood type. Red blood cells from people who are homozygous for the M allele carry a surface molecule known as the M antigen. On their red blood cells, those who are homozygous for the N allele contain the N antigen. A heterozygote is a person who carries both antigens.
  • (a) Genotype of blue scales fish will be BB.
  • (b) Genotype of blue scales fish will be bb.
  • (c) Genotype of blue scales fish will be Bb.

So, in this case B and b alleles will express equally.

Learn more about co-dominance:

brainly.com/question/3578928

#SPJ9

3 0
1 year ago
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