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Lilit [14]
2 years ago
8

Some traits, such as earlobe attachment, blood type, and the presence or absence of dimples, have limited variation throughout t

he human population because they are controlled by a single gene. Other traits, such as skin color and human height, are widely variable throughout the human population because
Biology
2 answers:
zalisa [80]2 years ago
7 0

They are controlled by more than one gene

LekaFEV [45]2 years ago
3 0

Answer:

The correct answer would be "they are polygenic traits".

Polygenic traits are those which are controlled by at least two different genes.

As more than two genes are involved in controlling a single trait, so they show more variations as compared to the traits which are controlled by a single gene.

For example, height is controlled by at least three genes and thus six alleles are involved in regulating height.  

Polygenic traits often show a bell-shaped curve in a population.

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Producers make up what part of the food chain
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would be the second part, plants.

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In fruit flies, the gene for red eyes (R) is dominant and the gene for sepia eyes (r) is recessive. If a red-eyed heterozygous f
ladessa [460]
The answer is Rr and rr.

We know:
r - recessive allele
R - dominant allele
RR - dominant homozygote with red eyes
Rr - heterozygote with red eyes (since one dominant allele R can mask recessive allele r)
rr - recessive homozygote with sepia eyes

Heterozygote Rr can give to the offspring either dominant allele R or recessive allele r. Recessive homozygote rr can give to the offspring only recessive allele r (take a look at the uploaded image of Punnett square).
After crossing the parents:
Parents:        Rr    x     rr
Offspring:  Rr    rr    Rr    rr

So:
2 out of 4 offspring will be with heterozygous with red eyes Rr: 2/4 = 0.5 = 50%
2 out of 4 offspring will be with homozygous with sepia eyes rr: 2/4 = 0.5 = 50%

8 0
3 years ago
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A, they use the same bases but in a different order

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How does water enter a plant? *
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Water enters a plant from the roots absorbing the water from the soil.

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