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Naily [24]
3 years ago
7

describe what happens to the fur of a Himalayan rabbit after prolonged exposure to a low temperature. The change in fur color is

most likely due to 1) the effect of heredity on gene expression 2) the arrangement of genes on chromosomes 3) environmental influence on gere action 4) mutations resulting from a change in the environment
Biology
1 answer:
madreJ [45]3 years ago
4 0
The Himalayan Rabbit sports black fur on its extremities. This is due to an ancestral trait; the Himalayan Rabbits carry “temperature sensitive tyrosinase genes” which controls fur pigmentation. The rabbit’s ancestors, which would have had to survive in the cold Himalayan environment would have, through natural selection, favored a gene that allows for a darker pigmentation. Through evolution the Himalayan Rabbit passed down the genotype for a melanin producing gene, which activates in low temperatures, changing the individual rabbit’s phenotype to fit the climate.

So your answer is choice 1

Hope this helped!
~xox Melis
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A gene has 2 alleles, R & B, List the possible genotypes? I also need help with questions 5, 6, 7 and 8 please help! Pls loo
irakobra [83]

Answer:

5.) The possible genotypes should be: RR RB BB ( if the could for the same proteins)

6.) Frequency of R: 0.5

7.)Frequency of R: 0.5

8.)Frequency of R: 0.375

Explanation:

5.) If R and B code for the different forms of the same protein then they are only a few possible out comes

6.) First calculate the total alleles in population

allele R= 40

Allele B=40

total allele = R+B= 40+40

=80

Now to find allele R frequency is:

(Total R alleles) / (Total allele in pop)

40/80=

0.5

7.)Calculate the total alleles

Alleles from for R

RR= 10

R=10x 2= 20

Multiply the value by 2 because there are 2 R alleles present in

RB=20

R=20

Number doesn't change there is only 1 R allele

Total R=20+20

=40

Alleles For B

BB=10

B=10×2

=20

Same thing here, two B alleles together so multiple by 2

RB=20

B=20

Total B= 20+20

=40

Total alleles in pop add

40+40

=80

Frequency of R

Total of R/Total Alleles

=40/80

=0.5

8.)Repeat the same thing in 7 but use different numbers

RR=10

R=10x2

=20

RB=10

R=10

Total R= 20+10

=30

5 0
3 years ago
Mitosis and meiosis are processes involved in cellular reproduction. Which of the following describes and event that results fro
ikadub [295]

C. daughter cells from meiosis are not identical from parent cell

8 0
3 years ago
Which is true about pluto? (Apex)
Nutka1998 [239]

Answer:

C

Explanation:

Pluto is not the smallest orbiting body (which includes comets, asteroids, and moons), pluto is the smallest orbiting planet

All planets have an elliptical orbit, not just pluto

Pluto has several moons

Therefore, the right answer is C

6 0
3 years ago
On which part of the body does long-term use of stimulants (e.g., nicotine, cocaine, and methamphetamine) have the most signific
Y_Kistochka [10]
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With long-term use, the use of stimulants would affect the central nervous system (speeding it up), the brain, and the functions necessary to live, like respiration, heart rate, blood pressure, body temperature. Levels of neurotransmitters like dopamine, serotonin, and GABA, which are responsible for the regulation of different processes,  are also impacted, which creates a chemical disbalance ultimately resulting in behavioral changes, mood swings, altered attention, movement and energy, stress etc.

So the part of the body that is affected the most with the long-term use of stimulants like cocaine, nicotine, methamphetamine is the brain of course, which is where these substances have the most impact, but the impact on the central nervous system, autonomous nervous system, and neurotransmitter levels is significant.
6 0
3 years ago
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JulsSmile [24]

Answer:

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Explanation:

5 0
3 years ago
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