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jonny [76]
2 years ago
15

Harold’s wonders how much of a role genetics plays in determining his weight. He has heard about a gene, called leptin. Mice wit

h a defective form of the leptin gene tend to?
Biology
1 answer:
sweet [91]2 years ago
3 0

Weight is a quantitative trait and mice with defective leptin tend to have problems controlling weight since this gene is associated with it.

<h3>What is a quantitative trait?</h3>

A quantitative trait is a phenotypic feature controlled by many genes and the interaction with the environmental factors.

Weight, height, behavioral features are all examples of quantitative traits because these types of phenotypic features show continuous variation.

Quantitative traits are modulated by gene interactions and therefore exhibit both epistatic and pleiotropic effects.

The leptin gene is a gene in mammal involved in neuronal control to metabolic signals and thereby it is associated with weight.

In conclusion, weight is a quantitative trait and mice with a defective form of the leptin gene tend to have problems controlling weight because it is associated with this trait.

Learn more about quantitative traits here:

brainly.com/question/88535

#SPJ1

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Which component of a urinalysis reflects the amount of waste products and solids in urine?
tigry1 [53]

The component of urinalysis that reflects the amount of waste products and solids in urine is called Specific Gravity

A urine test examines the various elements in urine.

The kidneys filter the blood to remove waste products, minerals, water, and other chemicals that are then excreted in the urine. There are countless distinct bodily wastes in urine.

Urine can be used in more than 100 different tests. The tests for color, clarity, odor and specific gravity are frequently performed as part of a routine urinalysis.

The amount of chemicals in the urine is measured using specific gravity. Additionally, it demonstrates how effectively the kidneys regulate the amount of water in urine.

The more solid stuff there is in the urine, the greater its specific gravity. When you consume a lot of liquids, your kidneys produce urine with low specific gravity and high water content. Your kidneys produce urine with high specific gravity and little water when you don't drink any fluids.

To learn more about urinalysis please click on the link brainly.com/question/8696585

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5 0
2 years ago
Explain why chances of nose bleeding increase with altitude in humans​
lbvjy [14]

Answer:

High altitude – as altitude increases, the availability of oxygen decreases, making the air thinner and drier. The dryness can cause the nose to bleed.

3 0
3 years ago
Dr. breiland examines the relationship between the physical properties of light, such as its amplitude and wavelength, and a per
ale4655 [162]

The term would be psychophysics

Psychophysics is a science branch that investigates the relationship between physical stimuli (in this case light stimuli) and the sensations and perceptions they produce (like perception of color). It represents the combination of psychological events (psycho-) and physical events (-physics) with the purpose of finding their quantitative relation. Measuring the stimulus parameters (such as amplitude and wavelength of light stimuli) it is possible to determine the minimum perceptible stimulus or the threshold stimulus.

8 0
3 years ago
How do alpha and beta particles get into the body?
laila [671]

Hello!

While they do not penetrate very far into the body, they can indeed get through.

Commonly, materials that emit alpha, beta or gamma radiation get  into the body alone or with other materials which have may become contaminated.

Here are some ways these could get in:

Through breathing; It could be in the air or mixed with dust, which is in the air.

Drinking; It disolves in water, meaning the material could get in your body without you knowing.

In the soil; If soil is contaminated, and plants grow in that soil, you will get a small ammount of alpha and beta particles.

Lastly, animals; Plants and animals can become contaminated, the particles coud be taken in through consumtion.

Hope this helps!

Have a great day!

6 0
4 years ago
By _______ the medulla in rats, scientists were able to cause a cessation in breathing. fb by _______ the amygdala in rats, scie
natta225 [31]
By lesioning the medulla in rats, scientists were able to cause a cessation in breathing. By electrically stimulating the amygdala in rats, scientists were able to trigger aggressive behaviour.
The medulla or medulla oblongata is found in the brainstem and is the structure that regulates autonomic functions of breathing, heart rate and blood pressure. Lesioning is a surgical term which describes the process of injuring a specific part of the brain. Therefore, when the medulla is lesioned, it can no longer function properly and the autonomic process of breathing is interrupted. 
The amygdala is comprised of two nuclei within the temporal lobes of the brain and is considered part of the limbic system. Its functions include the processing of memory, decision-making and emotional responses. It has been shown that by electrically stimulating the amygdala in animals, their aggressive behaviour is increased.


6 0
4 years ago
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