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san4es73 [151]
3 years ago
8

Describe the two forms of secondary structure.

Biology
1 answer:
professor190 [17]3 years ago
8 0
Secondary structures are dependent upon hydrogen bonding. The two main types of secondary structure are the a-helix and the B-sheet. The a-helix is a right-handed coiled strand.
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The answer is A!  <span>Deciduous forests are not affected by a wildfire or a prescribed fire.</span>
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Expressivity is the term used to describe the balanced genetic output from a hemizygous condition. True or False
dem82 [27]

Answer:

The statement is FALSE.

Explanation:

In genetics, expressivity refers to the amount of variation in a non binary phenotype across individuals, who are carrying a specific genotype. Scientists believed that variable expressivity is controlled by different factors such as environment, genetics and lifestyle choice. An example of expressivity is  a series of blue eye color that has different shades of blue. Thus, expressivity is not about balanced genetic output but varied genetic expression.

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3 years ago
Identify the evolutionary forces that can cause allele frequencies to change from one generation to the next.
Irina-Kira [14]

<u> Allele frequencies to change from one generation to the next.-</u>

<u>B. </u><u>Mutation</u><u>; C. Random genetic drift; D. </u><u>Migration</u><u>; F. Natural selection</u>

  • Selection, mutation, migration, and genetic drift are the mechanisms that effect changes in allele frequencies.
  • When one or more of these forces are acting, the population violates Hardy-Weinberg assumptions, and evolution occurs.

Why do allele frequencies change from one generation to the next?

Random selection: Allele frequencies may fluctuate from one generation to the next when people with particular genotypes outlive those with different genotypes.

No mutation: Allele frequencies may fluctuate from one generation to the next if new alleles are produced via mutation or if alleles mutate at different rates.

What are 5 factors that cause changes in allele frequency?

  • A population, a collection of interacting individuals of a single species, exhibits a change in allele frequency from one generation to the next due to five main processes.
  • These include natural selection, gene flow, genetic drift, and mutation.

Learn more about allele frequency

brainly.com/question/7719918

#SPJ4

<u>The complete question is -</u>

Identify the evolutionary forces that can cause allele frequencies to change from one generation to the next. Check all that apply

A. Inbreeding

B. Mutation,

C. random genetic drift

D. migration

E. extinction

F. natural selection

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C. Hardness is the answer
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What are loops within orbits?
True [87]

Answer:

precession

Explanation:

The orbit isn’t the simple ellipse, rather it is one that moves a little, loop after loop. This motion is called precession, and you may have heard about it when astronomers talk about the precession of the orbit of Mercury

5 0
3 years ago
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