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Juliette [100K]
4 years ago
5

Explain why polygenic traits are expressed through quantitative variation, using skin color as an example.

Biology
2 answers:
shepuryov [24]4 years ago
6 0

Polygenic traits are quantitative because their phenotype expression depends on several different alleles found on different chromosomes.

Explanation:

<em>In this case each dominant capital gene produces one unit of skin color, therefore, a wide range of intermediate skin colors are produced depending on the number of dominant capital genes. </em>

sleet_krkn [62]4 years ago
4 0

If there are more alleles present for darker skin tone, then the offspring will have darker skin pigment than the parents may have.

There can be varying expressions of pigment color from dark to light based on the alleles received, even in the same family.

The sum of the allele combinations determines the expression of the trait from one degree to the other.

A bell curve shows the quantitative variation.

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Answer:

There are a couple different possible answers, since there are multiple different structures that are present in both types of cells. So you have to make the choice of what to put.

The structures that prokaryotic and eukaryotic cells have in common are: plasma membrane, ribosomes,  and cytoplasm

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Cellular metabolism extracts and releases energy like a wild fire.
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Yes, yes it does for that statement.
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Put the components of the visual projection pathway in order starting with the retina and ending with the brain. Instructions Ch
algol [13]

Put the components of the visual projection pathway in order starting with the retina and ending with the brain. In order, starting from the lowest to the highest, we have:

  1. Bipolar and ganglion cells of the retina
  2. Hemidecussation in optic chiasm
  3. Optic tracts
  4. Lateral geniculate nucleus (LGN) of the thalamus
  5. Optics Radiation
  6. Primary visual cortex in the occipital lobe

The visual projection pathway is referred to as the channel through which electrical impulses created by the retina are transmitted to the brain.

When light penetrates the eye into the retina;

  • The bipolar and ganglion cells carry the signals from photoreceptors  (cones and rods) to ganglion cells, either actively or passively.

  • The axons of the ganglion gather and unite to form the optic nerve.

  • The optic nerve leads to the optical chiasm where hemidecussation of the optic nerve fiber takes place.

  • In the Optic Chiasm, the optic tract contains the nasal fibers that join from the left eye and connect with temporal fibers from the right eye, vice versa.

  • The lateral geniculate nucleus (LGN) which connects from the optic tracts has nerve endings that send optical radiation information from the superior visual fields to the inferior visual fields.

  • The primary visual cortex region is largely located on the occipital lobe of the medial brain surface, its function is to receive and process the optical radiation information sent from the (LGN).

Therefore, we can conclude that we understood the order, mechanism, and process in the visual projection pathway.

Learn more about the visual projection pathway here:

brainly.com/question/14969403?referrer=searchResults

5 0
3 years ago
What is the role of rabbit in food chain ?​
posledela

Answer:

Rabbits are herbivores

Explanation:

Rabbit are herbivorous and directly depends on the green plants generally grasses for supply of food and energy. It is found at the second position in the foodchain. We can say that the rabbit is primary consumer in food chain. It is also link between the foodchain of grassland and forest.

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Cells within an epithelium are held together by special connections called junctions. Which junction provides a direct passagewa
slega [8]

Answer:

Gap junctions

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The cell to cell communication is a characteristic feature of the multicellular organism which takes place through the special junctions.

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Gap junctions are formed by the arrangement of connexon proteins in the membrane which allows the molecules smaller than the 1000 Da to move between the cells.

Thus, a Gap junction is the correct answer.

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