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#Question id: 19109


Assume that mating is random. Colorblindness is an X-linked recessive trait that is found in about 5 percent of males. What fraction of females are homozygous for the colorblindness allele?  

#SCPH12 I Genetics
  1. 0.95%
  2. 1.83%
  3. 3.33%
  4. 0.25%
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#Question id: 8951

#SCPH28 | Zoology

An animal that swims rapidly in search of prey that it captures using visual senses concentrated at its anterior end is likely to be

TLS Online TPP Program

#Question id: 16133

#SCPH01 Biochemistry

You are running a human assisted reproduction clinic and providing state-of-the-art genetic diagnostic services. A married couple who already had a child with cystic fibrosis approach you because they wish to have another child, but only if they can be assured that the child will not have cystic fibrosis. You genotype the woman and discover that she is a heterozygote for Del508, the most common mutation causing cystic fibrosis. You suggest that the couple consider first polar body testing, in which several unfertilized oocytes (each with its first polar body) are retrieved from the woman, the first polar bodies are removed, and PCR tests are conducted on DNA from each of the first polar bodies. The couple agrees, and you obtain the following results:

 
Given the couple's desire to have a child without cystic fibrosis, which oocytes would you employ in vitro fertilization?

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#Question id: 3683

#SCPH05 I Biotechnology

In some viruses, RNA serves as the storage of genetic materials and DNA is synthesized from RNA by the enzyme known as:

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#Question id: 5705

#SCPH28 | Zoology

The chromosome has been broken at two points, and the segment between them has been inverted. What will be affects of this inversion however, person is heterozygous this abnormality?

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#Question id: 5225

#SCPH06 I Botany

Homeotic genes contain a homeobox sequence that is highly conserved among very diverse species. The homeobox is the code for that domain of a protein that binds to DNA in a regulatory developmental process. Which of the following would you then expect?