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WITCHER [35]
2 years ago
5

Explain the difference between chromatids and chromatin

Biology
1 answer:
Anna35 [415]2 years ago
5 0
The chromatids are made of a substance called chromatin. This is a single, very long strand of DNA. ... The chromatin is copied, so you now have 92 strands, that are each spiraled up to form the chromatids. The 2 copies of each chromatid are joined together by a centromere to form a chromosome.
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There are 252 deer in a population. There is no net immigration or emigration. If 47 deer die and 32 deer are born in one month,
morpeh [17]

Answer:

240

Explanation:

252-47=205

205+32=237

237 to the nearest whole number is 240

hope it helps

7 0
2 years ago
DNA, the genetic material of living organisms, is damaged by light in the
insens350 [35]

Answer:

The correct option is <em>B) ultraviolet region, especially below a wavelength of 320 nm.</em>

Explanation:

Ultraviolet light carries an enormous amount of energy in it. It is invisible to the human eye. When UV light with enormous energy and wavelength lesser than 320nm, hits the DNA, it causes changes in the structure of the DNA. Mostly, it affects the thymine nitrogenous base regions and forms pyrimidine dimers. The structure of the DNA changes on all the sites where dimers form and hence, they cannot be properly transcribed.

6 0
2 years ago
Why do scientists dispute the claim that the Loch Ness monster is a real creature?​
Sauron [17]

Explanation:

Scientist disputes the claim that the Loch Ness monster exists beyond folklore because no one has truly seen them. Loch Ness monster in Scottish folklore is a monster that resides in the Scottish highlands in Scotland.

Scientists follow methods to substantiate a claim. A body of evidence must be available to justify an observation in the scientific realm.

No clearcut picture of the monster has been taken.

The monster is merely a folklore myth just like dragons.

Science does not work with hearsay and claims that cannot be substantiated and proven.

Learn more:

Experiment brainly.com/question/5096428

#learnwithBrainly

6 0
3 years ago
Describe how mutations lead to genetic variations.
pickupchik [31]

Describe how mutations lead to genetic variations.

Mutations are changes in the DNA sequence of any organism. These DNA sequence comprise genes which control all the traits of an organism such as height, weight, eye color or which specific protein will be formed in body at which time. Everything is controlled by tiny pieces of DNA. If there occurs any change in the DNA sequence of an organism, it can be lethal to it, for example: In case of cancerous mutations where proteins controlling cell division are badly affected. Other mutations are simply passed to the offspring leading to genetic variations in the offspring. This is how mutations leads to the changes in genetic of an organism.

Which appears to be more dangerous: the BRC1 or BRC2 mutation?

The BRC1 and BRC2 are mutations or changes in the BRCA gene of humans mostly females. BRCA gene is basically a tumor suppressor gene which in some cases undergo mutations of different types. Some of which can be unharmful while BRC1 and BRC2 are typically very dangerous mutations because they increase the chances of a woman to develop breast cancer. Woman with BRC1 and BRC2 mutations have five times more risk of developing the breast cancer than other women. Studies suggest that BRC1 mutation is more dangerous than BRC2 mutations because a greater number of patients seen have BRC1 kind of mutation. Moreover, BRCA1 is associated with triple-negative breast cancer response in which a person cannot be fully treated with some drugs like which does not respond to hormonal trastuzumab and hormonal treatments.  

Analyze a woman’s risk of dying of cancer if she carries a mutated BRC1 gene.

The risk of a woman to die with cancer due to with BRC1 mutation are quite high. This is because 18 percent of the women which develop breast cancer due to BRC1 mutation die while only 2.8 percent of the women who develop breast cancer due to BRC2 mutations die. This indicates substantially higher risk of BRC1 patients of dying as compared to BRC2 patients.

How do heredity and inheritance relate to the data presented in these charts?

Please add charts.

What data would you need to see in order to draw conclusions about the effectiveness of preventive surgeries?

There are several preventive surgeries used to prevent the chances of breast cancer in women. However, the genetic history of a person and her family’s genetic history is important to see before drawing some effective preventive surgery.

What does the age at diagnosis tell you about the mutation?

By looking at different cases of breast cancers and analyzing the data of different countries, we noticed that,  the onset of disease takes several years because it is a genetic level mutation and the onset of mutation starts in earlier years of a woman’s life however she fully becomes a victim and notices it in late years of her life. This is why it cannot be easily diagnosed in early years even it is present there.

Explain how breast-cancer genes are still present in the population, despite cancer-related surgeries and deaths.

The genes responsible for breast cancer such as BRC1 and BRC2 are inherited from parents to offspring in a dominant fashion which means only one copy of gene is enough for the onset of the disease. Also because the disease is caused due to genetic level mutations, even if the doctors remove the cancers through surgeries they are not able to remove each and every affected gene from an organism which is passed from parents to offspring and still present in population.

Hope it helps!

7 0
3 years ago
Need help asp!!!<br> What does the ETC use high energy electrons from the Krebs cycle for?
Masteriza [31]

Answer:

The electron transport chain uses the high-energy electrons from glycolysis and the Krebs cycle to convert ADP to ATP.

Explanation:

Please mark me as the Brainliest answer.

3 0
3 years ago
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