Why are tight junctions especially abundant in epitheliel cells? eg in the skin and intestines

1 answer:

3 0

Tight junctions hold the cells together as a rivet would in hardware so it can't be taken apart. This makes it so skin and intestines are very strong and don't break very often

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Which process uses acetyl CoA as a reactant?

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Two members of the excavate clade that can cause disease are:______. a. euglenids and kinetoplastids. b. dinoflagellates and api

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Answer:

Two members of the excavate clade that can cause disease are diplomonads and parabasalids

Explanation:

The excavate clade comprises of unicellular organisms which are eukaryotic. This group contains free-living organisms as well as organisms which form symbiotic relationships.

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The gene for hairline shape has two alleles: widow's peak (W) and straight hairline (w). What is the percent probability that on

Alexandra [31]

Answer:

Probability of having a child with genotype Ww is 50%.

Explanation:

This question involves a single gene coding for hairline shape in humans. The allele for widow's peak hairline (W) is dominant over the allele for straight hairline (w). This means that allele W will mask the phenotypic expression of allele w in a heterozygous state.

In a cross between a mother with genotype, Ww and father with genotype, ww, the following gametes will be produced by each parent:

Mother (Ww)- W and w

Father (ww)- w and w

Using these gametes in a punnet square (see attached image), four possible offsprings will be produced with genotypes: Ww, Ww, ww and ww.

Ww(2) : ww(2) or Ww(1) : ww(1)

Hence, 1 out of 2 children produced by the parents will have a genotype Ww, i.e. 1/2. Therefore, the percentage probability is 1/2 × 100= 50%.

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