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Helen [10]
4 years ago
7

2. How might a mutation that causes a single letter change in the DNA sequence affect

Biology
1 answer:
charle [14.2K]4 years ago
8 0

Answer:

A mutation that causes a single letter change in the DNA sequence can affect your protein structure and function because the sequence of letters in a gene determines the sequence of amino acids in the protein that it encodes. A single letter change in the DNA alters the mRNA which alters the amino acid sequence of the resulting protein and sometimes that can cause serious results if it changes the way a protein works.

ex. sickle cell disease - a single letter swap in the gene that encodes the hemoglobin molecule results in deformed red blood cells

Hope that helps.

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An elk herd is observed over many generations. Most of the full-grown bull elk have antlers of nearly the same size, although a
mariarad [96]

Answer:

B. Stabilizing selection

Explanation:

When natural selection acts against the extreme phenotypes but favors intermediate variants, it is called stabilizing selection. Stabilizing selection is mostly operative in the population s that are well adapted to the prevailing environmental conditions. Individuals with average or intermediate phenotypes are favored by stabilizing selection.

In the given example, the elk population maintains the antler size over generations. Most of the elks have intermediate-sized antlers while only a few have larger or smaller antlers. Since the average antler size (the intermediate phenotype) is favored over the extreme ones (larger or smaller sized antlers), the population is experiencing stabilizing selection.

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4 years ago
Ellen is jogging. As her body's metabolism becomes more active, how will her body protect itself initially against acidosis?
julia-pushkina [17]
As her body's metabolism becomes more active, A. Ellens body will force her to slow down by cramping her muscles.  A buildup of lactic acid will occur in Ellen's muscles, causing severe cramping.
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3 years ago
The branch of biology that explains both the diversity and the unity of life is ________. microbiology taxonomy evolution geneti
iVinArrow [24]

Answer:

Evolution

Explanation:

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Evolution also explain the unity among organisms by explaining their shared characteristics. This refers to their common ancestors.

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3 years ago
Genetic codes contain____ (Select all that apply.)
Yuki888 [10]

Answer:

- complex info; detailed instructions

genetic codes contain complex information; detailed instructions

Explanation:

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-The genetic code consists of 64 triplets of nucleotides. these triplets are called codons. With three exceptions, each codon and codes for one of the 20 amino acids used in the synthesis of proteins. that produces some redundancy in the code: MuscleTech amino acids being encoded by more than one codon.

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Chemical signals in plants affecting the growth, activity and development of cells and tissues are
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Answer:

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   Plant tissues are limited to meristematic, ground, dermal and vascular tissues.

   Plant structures are limited to cambium, guard cells, phloem, seed, stomata and xylem.

Explanation:

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