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Pavel [41]
3 years ago
11

Which of the following statements apply to the variation in human skin color?

Biology
2 answers:
masya89 [10]3 years ago
3 0
The correct options are as follows:
1. Human skin color variation is primarily determined by the type and amount of melanin pigment in the skin.
2. Human skin color variation likely evolved in response to differences in the intensity of sunlight around the world.
3. Human skin color evolve recently in hominid evolution, once some population of human ancestor migrated out of Africa.
The color of human skin is primarily determine by melanin. The intensity of the sun in the climate where one is living also affect the type of skin color that will dominate in a geographical area.
NemiM [27]3 years ago
3 0

The right answer is A, B, and D.

Over the millennia, the color of the skin of humans has adapted to the local sunshine.

A natural filter, melanin, has gradually developed under the influence of this selection pressure.

Melanin is a dark-colored pigment (from black to reddish brown) found in the skin, hair, hair and the membrane of the eye. The amount of melanin in an individual depends on several factors such as heredity, exposure of the skin to the sun (epigenetic factors) hormone levels or certain diseases.


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a person's____will be the same on Jupiter and earth, a person's_____will be greater on Jupiter than on earth.​
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A person's mass will be the same on Jupiter and Earth, a person's weight will be greater on Jupiter than on Earth.

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Mass is universal, meaning it can't change, but weight is used to measure how heavy something is, so, on a planet like Jupiter, since the gravity is more, you'll weigh more there.

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Colorblindness is a sex-linked recessive trait. If B=normal and b=colorblind, what would be the genotype of a normal male? Quest
Flauer [41]

Answer:

The Genotype of a normal male wil be: XBY.

Explanation:

  • A sex linked recessive disorder is expressed only in males because males have only one X chromosome and so only one allele for this gene can be present in them.
  • Hence, if the recessive allele is present then colour blindness will occur.
  • If the dominant allele is present then the male will be normal.
  • XbY has a recessive allele so the male with this genotype will be color blind.
  • XBYb cannot be aoption because Y chromosome cannot have the allele of the gene.
  • XBXb is a female carrier's genotype.
  • XBY has the dominant allele and so the man with this genotype will be normal.

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3 years ago
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