Which of the following human activities does NOT release carbon dioxide into the atmosphere?

Why is there two variations of each characteristic? Please explain :) !!

barxatty [35]

Answer in the gene for that characteristic cause these different forms. ... These two copies of the gene contained in your chromosomes influence the way your cells work. The two alleles in a gene pair are inherited, one from each parent. Alleles interact with each other in different ways

4 0

3 years ago

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Is glucose aversion a learned response, or is it inherited?

Keith_Richards [23]

Rather than being learned, glucose aversion is inherited as an autosomal incompletely dominant trait, which appears to he controlled by a single major gene. This was discovered through a study done on cockroaches, some were fed regular bait while some were fed bait laced with glucose. Through time they began to avoid the glucose.

3 0

3 years ago

A population of 100 tigers has 30 with horizontal stripes. Using pedigrees, you ascertain that horizontal striping is caused by

bixtya [17]

Assuming that this population is in Hardy-Weinberg equilibrium, we can sayt that the probability that, given enough time, all tigers in the population will have horizontal stripes is 30% = 0.3.

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Available data:

Population size, N = 100 tigers
Number of Tigers with horizontal stripes = 30
Horizontal stripes is caused by an autosomal recessive mutation.

We need to know the probability that all tigers in the population will have horizontal stripes, which is the recessive phenotype.

We assume that the population is in Hardy-Weinberg equilibrium, so there should be no evolution.

Since the population is in H-W equilibrium, the allelic, genotypic and phenotypic frequencies will remain the same generation after generation.

Now, we will calculate the allelic and genotypic frequencies of horizontal striped individuals in the population.

There are 100 individuals, and only 30 have horizontal stripes.

So, the phenotypic frequency, F(HS) is 30/100 = 0.3 = 30%

Since this is a recessive phenotype, this value equals the genotypic frequency, F(hh) = 30%

Finally, we can get the allelic frequency by taking the square root of this value.

F(hh) = q² = 0.3

f(h) = q = √0.3 = 0.55 = 55%

According to these calcs, the probability for the fixation of the recessive allele is 55%, and the probability that all individuals express the recessive horizontal stripes phenotype is 30%.

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You can learn more about Hardy-Weinberg equilibrium at

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6 0

3 years ago

Which accurately describes gymnosperms? Check all that apply. Some of them lose their leaves in winter.Some of them lack seeds.S

AleksandrR [38]

I think that correct answers are:
Some of them lose their leaves in winter. (i.e. Larix)
They include the tallest plants (i.e.Sequoia)

I don't think they are the oldest type of seed plants, since in the past the classes like progymnosperms and seed ferns existed prior to the gymnosperms. But question isn't absolutely clear to me and I can't be 100% sure.
All of the gymnosperms have seeds unless human grows some seedless variant.
Gymnosperms don't have flowers like angiosperms do, but some people think that cone is kind of flower.
Male cones produce pollen, not female.
Hope I helped :)

7 0

3 years ago

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In your own words, describe what information the visible DNA fingerprint provides for each DNA sample

Sidana [21]

Answer:

The visible DNA fingerprint can help extract DNA which, after analysis, can accurately identify the suspect or perpetrator of the crime.

Explanation:

DNA Fingerprinting:

DNA fingerprinting is a molecular analysis tool that can help identify a suspect in a crime through DNA extracted from fingerprints.
Specific patterns in the DNA, known as polymorphisms, can be identified through DNA fingerprinting.
The DNA fingerprinting process involves:

Extraction and purification of the DNA from the fingerprint.
PCR amplification to obtain high yield.
Fragmentation of the DNA by use of restriction enzymes.
Gel electrophoresis analysis of the fragmented DNA.
Analysis of gel to compare the size of the bands.

7 0

4 years ago