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Marta_Voda [28]
3 years ago
10

If 15% of a DNA double helix is the base adenine what are the percentages for the following bases?

Biology
1 answer:
Gnom [1K]3 years ago
4 0

Answer:

Thymine 15%

Guanine 30%

Cytosine 30%

Explanation:

Remember Chargaff's rules: C=G, T=A.

A = T

.15 = T

Now we've got .30 A and T, so we know 1 - .3 = .7 of the DNA should be guanine and cytosine.

.7 / 2 = .35

.35 = G

.35 = C

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Explain why most high pressure air system form at the poles<br>​
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Answer:

Subsidence

Explanation:

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6 0
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The force of attraction acting between two objects is called a. Inertia b. universal gravitation c. Momentum d. Buoyancy
andrey2020 [161]
The force of attraction between two objects is gravity (gravitational pull) so I believe that the answer is (b. universal gravitation).
5 0
3 years ago
Strawberry poison dart frogs have different skin colors within their population. The frogs can be categorized broadly using the
12345 [234]

Answer:

There will be more yellow-colored frogs in the population than red-colored frogs

Explanation:

<u>Available data</u>:

  • Strawberry poison dart frogs have different skin colors
  • The frogs can be categorized broadly using the colors green, blue, yellow, and red.
  • Frogs eaten by snakes

<u>Number of snake attacks             Frog color</u>

145 Approx                                          Green

180 Approx                                          Blue

125 Approx                                          Yellow

145 Approx                                          Red

 

The phenotype of individuals and the environment where they live, interact and determines the genes´ destiny in space and time. The result of this interaction and the gene destiny is Natural Selection. Natural selection selects beneficial alleles and increases their frequency in the population.

The attack by snakes is acting as a selective pressure on the frogs´ population. It is an ecological pressure that is modeling the frogs´ phenotype.

Animals that suffer more attacks are the blue ones, followed by green and red frogs. Those that suffer the fewest number of attacks are the yellow individuals.

So natural selection will be acting on this population favoring the alleles that code for yellow color. Genes that express yellow color increase more the frogs´ fitness than genes that code for the other colors. So natural selection increases the frequency of genes coding for yellow color and will decrease the frequency of the other alleles. Probably the less favored will be genes that express blue.

7 0
3 years ago
When glucose molecules are broken down, energy is released, and carbon dioxide and water are produced. What is this process call
Anna11 [10]
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8 0
3 years ago
2. In a certain fish, blue scales (BB) and red scales (bb) are codominant. When a fish has the
Sveta_85 [38]

Answer:

a) BB

b) bb

c) Bb

Explanation:

Co-dominance is a type of non-mendelian genetic inheritance in which two alleles of a gene are neither dominant nor recessive over one another, hence, they form an hybrid offspring that simultaneously exhibits the traits encoded by both alleles. This is the case of the scale color gene in a certain fish. The allele for blue scales (B) and allele for red scales are codominant. Hence, they produce an hybrid with a patchwork of both blue and red colours.

Therefore, a fish with blue scale color will possess an homozygous genotype of the blue allele: BB while a fish with a red scale color will possess an homozygous genotype of the red allele: bb. Since the patchwork fish is an hybrid or heterozygous, it will contain a combination of the blue and red alleles i.e. Bb.

Because both alleles (red and blue) are codominant, both traits encoded by both alleles will be expressed at the same time in the hybrid organism (patchwork fish).

5 0
3 years ago
Read 2 more answers
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