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Sidana [21]
3 years ago
7

Why do identical twins become increasingly different over time?

Biology
1 answer:
nika2105 [10]3 years ago
7 0

Explanation:

Identical twins may have less in common than they think. A study now shows that the expression of their genes gets more and more different with age.

The findings could help to explain why one twin may develop a genetically influenced disease, such as diabetes, while the other remains perfectly healthy.

Identical twins have identical genes, because they are born of an embryo that splits at a very early stage in development. Such twins are often indistinguishable in outward appearance. But over the course of time they may experience radically dissimilar health.

Most scientists have assumed that environmental and lifestyle differences cause such divergence. These things trigger chemical reactions that affect our DNA and the proteins entwined with our DNA, called histones. One such reaction, known as methylation, influences the expression of genes and so can have an impact on health.

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shepuryov [24]

Answer:c)

troposphere

Explanation:

Bz it is closest to plant

7 0
3 years ago
Read 2 more answers
Describe the relationship between the reactants and products of photosynthesis and cellular respiration.
Leni [432]
The reactants of photosynthesis are carbon dioxide and water, meaning during photosynthesis carbon dioxide and water are taken in to create energy. The reactants of cellular respiration are glucose (sugar) and oxygen, these are taken in by animals and humans to produce energy.
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Explanation:
The end products of Photosynthesis are starting products(reactants) of Respiration.
End products of Respiration are starting products(reactants) of Photosynthesis
7 0
3 years ago
Consider a cross between a man with an X-linked recessive disorder and a woman that's a carrier for the disorder. Approximately
Vadim26 [7]

Answer:

50%

Explanation:

Let's assume that the X linked allele "a" gives the disorder. Therefore, the genotype of the affected man would be X^aY while the genotype of the carrier woman would be X^aX. A cross between X^aY man and X^aX woman would produce progeny in following phenotype ratio: 1 affected daughter: 1 affected son: 1 normal but carrier daughter: 1 normal son.

Therefore, there are 50% chances that their children can express the disorder.  

6 0
3 years ago
The __________________ is a pear-shaped muscular organ that houses the developing fetus.. . A.ovaries. B.fallopian tubes. C.blad
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3 years ago
Histamine increases blood flow and vascular permeability. This would account for all of the following changes that occur during
AnnZ [28]

Histamine inhibits the chemotaxis which is the movement of cells along the gradient.

Histamine:

It is a neurotransmitter that is released by the mast cells in response to an allergen that causes an allergic reaction. It is responsible for redness of the inflamed area, heating, movement of leukocytes, and defense proteins to the site of injury. Histamine is responsible for vasodilation and increased permeability. The immune cells move to the site of injury and cause the flow of blood to the injured site. It plays an important role in allergic and hypersensitivity reactions. Histamine is also responsible for gastric secretion, smooth muscle contraction, and itching.

Learn more about histamine here:

brainly.com/question/1217609

#SPJ4

6 0
1 year ago
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