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jasenka [17]
3 years ago
6

What 3 principles of hereditary did Mendel discover

Biology
2 answers:
Darya [45]3 years ago
4 0
1. the inheritance of each gene is determined by the units that are passed down 2. an individual will get one unit from each of their parents 
3. a trait may not show up on an individual but it can still be passed on to a descendant
alisha [4.7K]3 years ago
4 0

Mendel was a Central European monk who published his ideas on genetics in 1866, but did not receive recognition until 1900 after his death. He taught high school mathematics, Greek and physics in the Czech Republic, which was Brno at the time, as well as performing his own genetics research.

Mendel performed his research with plants when studying genetics. Since heredity is the same across species, Mendel's results were able to be applied to both animals and humans. Mendel performed his experiments on common garden pea plants because they were easy to grow in large numbers and he could manipulate their reproduction easily since the pea plants have both male and female reproductive organs.

Mendel was also able to breed pea plants so quickly that he was able to observe inheritance patterns in as many as two generations each year. Mendel observed the principle of segregation and independent assortment and his principles are considered to be "laws" by many scientists today
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How would a small, uncharged lipid move across the cell membrane?
ElenaW [278]

Answer:

Through simple diffusion, down the concentration gradient.

Explanation:

The phospholipids of the membrane are amphipathic with hydrophillic heads and hydrophobic tails. Other polar molecules cannot go through this hydrophobic interior. Since small uncharged lipids are non polar and hydrohobic, they are able to go through the membrane without the help of transport proteins. Therefore, the last two options can be ruled out because facilitated diffusion includes the use of a protein. Diffusion involves molecules moving down the concentration gradient so the second option can be ruled out.

5 0
3 years ago
explain how natural selecin oacting on allele frequencies of a gene that controls body coloraiton can result in populations of 3
Aleksandr [31]

Answer:

Answer below

Explanation:

Well when natural selection occurs, genes that don't benefit the speicies, or more accurately, harm it by ruining camoflague. Natural selection can result in one creature evolving into 3 different species when those creatures get put into different environments that promote genetic mutations that help them survive. After a long while of genetic mutations coming and going to adapt to their environment, those three members of the species are no longer the same species because they've all adapted to different environments.

6 0
2 years ago
The elephants represented in lanes 3 and 5 could have been a match to the ivory sample if you failed to amplify one allele in ei
olga_2 [115]

About the question:

I failed to find the result of the PCR / electrophoresis. However, I will try to explain when to still consider a sample, and when to exclude it.

Answer:

Probably elephants 1, 2, 4, and 6 exposed a pattern of lines that differed in most alleles from the ivory´s pattern. So they were considered to be different and, hence, excluded. However, elephants 3 and 5 only were different in one allele, which might be due to the amplification failure. In these last situations, the experiment must be run again, and include many markers.

Explanation:

The genetic profile is the series of alleles, characteristic of each individual, concerning a series of DNA fragments.

Once genetic profiles are obtained by using PCR/electrophoresis, they must be subjected to interpretation. The researcher must compare profiles to find concordance between individuals or the lack of it.

In the exposed example, probably we have a profile of the ivory sample, and we need to find out to what individual or population it belongs to. So we need to compare the pattern of bands of the different lanes with the ivory´s pattern of bands.

In resumed terms, if the ivory´s patterns completely match with another lane pattern, then this is the individuals or population to whom it belongs the ivory. However, if they do not match, we need to exclude this individual.

But this is not as easy as it looks like. Sometimes it is difficult to interpret the results because bands are not so clear, and sometimes there are failures during amplification, as said before in the statement of the problem.

In these situations, what you need to do is look for the lanes that match the most with the ivory one and discard those that differ the most. These last patterns probably belong to a different animal or population, that why they can be excluded. Individuals suspected of being the same as the individual understudy or belonging to the same population, must be subducted to a repetition of the study. Also, the use of several markers in the study increases the matches chances.

So, in the exposed example, if the amplification fails in one allele, elephants 3 and 5 could be a match to the ivory sample, probably because all the other alleles do match. You can only exclude them if, after the experiment repetition, the involved allele is still different. On the other hand, you can eliminate the elephants 1, 2, 4, and 6 because their pattern bands are significantly different from the ivory´s patterns, so you do not even need to repeat the experiment.

7 0
3 years ago
State the function of valves in veins?​
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Valves ensure blood flows toward your heart. Vein valves work to bring the blood that flowed down via arteries back up to your heart.
3 0
3 years ago
In this food web, what would happen if the zebra population declined due
QveST [7]
I would say the answer is A
7 0
3 years ago
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