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aliya0001 [1]
3 years ago
11

Which effects are likely results of a forest fire? Check all that apply.

Biology
2 answers:
kondaur [170]3 years ago
7 0

Answer:

A D E

Explanation:

i know better then following what the other person said lol

IgorLugansk [536]3 years ago
5 0

Answer: A. Death D. habitat Loss E. Forced Migration

Explanation: A species probably won't go extinct just from a forest fire, and I don't really see them adapting because there is no more forest, so that doesn't really make sense. But some animals will Die, lose habitats, and probably forced to migrate to a different area.

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In Drosophila, the genes for withered wings (whd), smooth abdomen (sm) and speck body (sp) are located on chromosome 2 and are s
lesya692 [45]

Answer:

A) 47; B) 33; C) 272; D) 122

Explanation:

The three genes are linked.

The female with withered wings and a smooth abdomen has the genotype whd sm sp+/whd sm sp+.

The male with a speck body has the genotype whd+ sm+ sp/whd+ sm+ sp.

Both individuals are homozygous for all genes, so each of them only produces one type of gamete. The resulting F1 therefore has the genotype whd sm sp+/ whd+ sm+ sp, heterozygous for all genes and with a wild-type phenotype.

The females of the F1 were mated with homozygous recessive males (test cross): whd sm sp/whd sm sp.

<h3>A)</h3>

If we assume interference is 0, the probability of crossing over happening between the genes whd and sm is independent from the probability of crossing over happening between sm and sp.

The distance = frequency of recombination × 100, so the frequency of recombination (RF) between genes whd and sm is 0.305 and the RF between genes sm and sp is 0.155.

<u>The expected double crossover progeny among the 1000 offspring will be:</u>

RF whd-sm × RF sm-sp  × 1000 =

0.305  × 0.155 × 1000 = 47 individuals will be double crossover.

<h3>B)</h3>

Interference is 0.3

The interference is calculated as 1- coefficient of coincidence (cc).

cc = observed double crossover/expected double crossover

Therefore:

I = 1 - cc

cc = 1 - I

<u>cc = 0.7</u>

Observed DCO / 47 = 0.7

Observed DCO = 0.7  × 47

Observed DCO ≅ 33

<h3>C)</h3>

The parental gametes are whd sm sp+ and whd+ sm+ sp (the genotype of the F1 female is known).

Looking at them and at the gene map we can tell that the gametes that give rise to withered wings, speck body (whd sm+ sp) and smooth abdomen (whd+ sm sp+) phenotypes are the result of recombination occurring between genes whd and sm.

To calculate the expected number of individuals with those phenotypes among the 1000 progeny we need to determine the frequency of recombination between the genes whd and sm considering there's interference.

The distance whd-sm = RF x 100

The recombination frequency is the sum of the single crossover between whd and sm and the double crossovers.

The frequency of DCO is 33/1000=0.033.

Distance whd-sm/ 100 = SCOwhd-sm + DCO

0.305 - 0.033 = SCO whd-sm

<u>Frequency of SCO whd-sm= 0.272</u>

And the expected number of individuals with those phenotypes will be 0.272 x 1000 = 272.

<h3>D)</h3>

The gametes that originate the phenotypes withered wings, speck body, smooth abdomen (whd sm sp) and wild type (whd+ sm+ sp+) are the result of recombination between genes sm and sp.

Distance sm-sp/ 100 = SCOsm-sp + DCO

0.155 - 0.033 = SCOsm-sp

<u>Frequency of SCO sm-sp= 0.122</u>

And the expected number of individuals with those phenotypes will be 0.122 x 1000 = 122.

6 0
3 years ago
Select the correct answer.
Licemer1 [7]
I don’t know the answer to this question
3 0
2 years ago
What is a comparison of the actual use of renewable, sustainable resources, including water and land, that a population uses for
timofeeve [1]

Answer:

Right here

Explanation:

The renewable resource can be used over and over and replaced very fast to human standers. Nonrenewable resources cannot be made fast enough by human standards.

3 0
3 years ago
What animal that has a similarity of humans reproduction, and its difference.
wlad13 [49]

Answer:

Chimpanzees has a similarity of humans reproduction, and its difference is explained below in details.

Explanation:

Researchers discovered back in 2006 that chimpanzees experience around 98.4 and 99 percent of our DNA. They're more like to people than they are to gorillas! There are several similarities between animals and humans that you may have remarked. Humans and animals both feed, relax, imagine, and interact. We are also related in a lot of the means our bodies work.

4 0
3 years ago
What’s the importantance of the endosymbiotic
tia_tia [17]
Endosymbiosis is important because it is a theory that explains the origin of chloroplast and mitochondria. It is also a theory that explains how eukaryotic cells came to be.
8 0
3 years ago
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