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Ivanshal [37]
4 years ago
5

Before DNA was discovered, in which materials did scientists think the genetic material was stored?

Biology
1 answer:
natima [27]4 years ago
5 0

Answer: We all know that DNA act as repository of genetic information in most organism. But before the discovery of DNA it was thought that proteins act as a genetic material because protein is the final product of the cell dogma of cellular system and proteins helps in the formation of tissues and organs.

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What natural force is responsible for the formation of the cliffs by the ocean in the picture?
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Answer:

i think that the wind is responsible

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The only way to tell if the red blood cells are crenated is to
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is to go for medical check-up

Explanation:

it's through the medical checkup

you will know that it still crenated

8 0
3 years ago
I WILL GIVE BRAINLIEST!!!
Nesterboy [21]

Answer:

25%

Explanation:

When looking at a pedigree remember that:

  • squares are males
  • circles are females
  • the solid colored figure represents an individual affected by a disease
  • the empty figure represents a healthy individual

Let us assign the symbol X⁺ to represent the dominant allele linked to the X-chromosome and expressing healthiness, and X⁻ to represent the recessive allele expressing the dissease.

According to this pedigree

  • I1 is a man affected by the disease, YX⁻
  • I2 is a healthy woman X⁺X⁻
  • we can see that among the progeny (generation II) there are two individuals affected (a boy and a girl) and one healthy girl. This means that the mother I2 is heterozygous for the trait.

So, having their genotypes we can know what are the probabilities of getting a son with DMD

Parentals)    YX⁻     x     X⁺X⁻  

Gametes)   Y     X⁻      X⁺     X⁻

Punnett square)

                        X⁺             X⁻

            X⁻      X⁺X⁻         X⁻X⁻    

            Y        X⁺Y           X⁻Y

F1)

  • The probabilities of getting a healthy daughter X⁺X⁻ are 25%
  • The probabilities of getting a healthy son X⁺Y are 25%
  • The probabilities of getting a daughter with DMD X⁻X⁻ are 25%
  • The probabilities of getting a son with DMD X⁻Y are 25%
7 0
3 years ago
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One feature that amphibians and humans have in common is
Ipatiy [6.2K]

Answer:

Both have two circuits for circulation.

Explanation:

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  • In the<u> pulmonary circuit</u>  deoxygenated blood from all parts of the body is pumped from the heart to the lungs to be oxygenated and after it is oxygenated it is pumped back to the heart.
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Heavy wear on neandertals incisor teeth has led some scientists to conclude that neandertals used their front teeth:
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The answer should be <span>For gripping materials</span>
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