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ExtremeBDS [4]
3 years ago
13

How can a gene map be used? Why do scientists induce mutations in organisms?

Biology
1 answer:
jarptica [38.1K]3 years ago
4 0

Answer:

Genome mapping is used to identify and record the location of genes and the distances between genes on a chromosome. Genome mapping provided a critical starting point for the Human Genome Project. Sequenced DNA fragments can be aligned to the genome map to aid with the assembly of the genome.

By inducing mutations, scientists have been able to increase genetic variation, which breeders depend on to produce crops with desirable traits, such as resistance to diseases and insects. ... Mutations can be induced in a variety of ways, such as by exposure to ultraviolet or ionizing radiation or chemical mutagens.

Explanation:

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21. Describe the three steps by which a population<br> of insects becomes resistant to a pesticide.
Tresset [83]

Answer:

1. Survivors of the pesticide have a gene that protects them from it.

2. Then the survivors pass on the gene to their offspring,

3. Each time the pesticide is sprayed, the insects have a greater chance of survival.

6 0
3 years ago
You learn that a Mars lander has retrieved a bacterial sample from the polar ice caps. You obtain a sample of these bacteria and
Misha Larkins [42]

Answer:

a. conservative replication

b. semi conservative replication

c. dispersive replication

d. discontinuous replication

e. continuous replication

The CORRECT ANSWER IS C.

c. dispersive replication

Explanation:

The attached image shows a single band that becomes lighter (in volume) and increase in darker intensity (in times of color) is revealed with consecutive replications. The major pattern that would produce these outcome is dispersive replication.

Conservative replication do reveal two bands (a 14N for the wholly latest molecule, and a 15N for the totally antiquated molecule) after the initial replication. Therefore, this wholly wrong.

Semi-conservative replication reveal an individual band of transitional weight after the initial  replication, followed by two bands following the second replication (one of transitional weight, and the other at the 14N position). These two bands is observed in each following replication, with the transitional weight becoming lighter in color as the 14N band is seen to appear darker in color.

The real pattern gives an individual band that pinpoints to all molecules in an individual replicative cycle possessing the same constituents.

Dispersive replication, has its molecules to be a blend of old (15N) and new (14N) strands. Each replication raises the ratio of new to old strands as it explains the reason an individual band is shown raised (lighter in weight) with every replication.

4 0
3 years ago
Which number indicates the number of atoms of each element in a molecule of a substance.
timurjin [86]
The subscript; the number at the bottom right of the symbol
3 0
3 years ago
Which feature is
Yanka [14]

Answer:

C. Coupled reactions establish an electrochemical gradient across a membrane.

Explanation:

  • During cellular respiration in mitochondria, and during photosynthesis in chloroplasts, the electron transport chain requires a proton gradient to pump protons across the membrane by active transport.
  • Protons flow back across the membrane by facilitated diffusion through ATP synthase, which utilizes them to phosphorylate ADP to ATP.
  • This process of ATP synthesis by harnessing the elctrochemicaal gradient geenrated by the diffusion of protons across the biological membrane through ATP synthase is called chemiosmosis.

7 0
3 years ago
Which of the following will cause a decrease in the mass of an object?
puteri [66]
I believe the answer is B
8 0
3 years ago
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