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The mutation results in the breed's distinctive point markings (ears, mask, tail and legs) and lighter body color. Use this information to explain the pattern of the cat's fur pigmentation.
Answer:
The mutation of the TYR gene results in the enzyme tyrosinase to be heat susceptible. Tyrosinase takes part in the production of melanin to give darker fur in colder areas. The areas like the tail, legs, ears, and face do lack as much body heat and so will get darker.
Explanation:
A unique protein (enzyme), known as tyrosinase, is the major workhorse in the development of the melanin. A research team from the University of California, USA, led by L. A. Lyons, discovered that Siamese cats have tyrosinase that went through mutation due to the changes in the DNA helix and is temperature-sensitive as it's activity reduces with a rise in temperature. This explains why cat’s warm parts of the body are coated with white, melanin-lacking hair since Tyrosinase is deactivated in these regions and melanin is not developed – hair is white-colored. On the other hand, in cooler boundary the enzyme is active and the melanin is formed – hair has dark color.
Answer:
Muscular and Skeletal
Explanation:
The Muscular and Skeletal systems work together to move appendages and joints. They are sometimes referred to as the Musculoskeletal System.
Answer:
There are many unhealthy activities which are carried out by the millennial's in recent years, which most of time leads them to unwanted and possibly dangerous consequences. It is due to lack of exercises and indulging in unethical activities. Most of the young people faces neurological and muscular disorders.
Explanation:
<u>Muscular Weakness:</u>
- The main cause of the muscle weakness is the lack of thyroid hormone in the blood. Which is obviously due to disorder in the thyroid gland inside a human body. And the disorder is caused by the condition of the body destroying its own tissues and cells by producing anti-bodies against them which is known as <u>Hashimoto's thyroiditis.</u>
<u>Symptoms: </u>
- weight gain
,
- feeling cold
,
- dry skin and hair,
- fatigue
,
- And in females the irregular or heavy menstrual periods.
<u>2. Narcolepsy and Insomnia:</u>
They are two main causes for muscle weakness, as they are due to irregular sleep. Most of the patients in the hospital while on bed for a long time may also experience this disorder.
<u>3.Infectious causes of muscle weakness:</u>
The muscle weakness is also caused by the bacterial attack on the human body system leading to some severe cases of health problems. The main causes for the muscle weakness are as below:
- <u>Influenza,Common flu:</u> The influenza, flu can cause some temporary muscle problems inside the body.
- <u>Syphilis:</u> A sexual transmitted diseases(STD), which is contracted by the person through contact with the effected person or patients. It also causes muscles weakness.
<u>4.Spinal cord injuries:</u>
Any severe damage ti the
The nucleus is particularly important among eukaryotic organelles because it is the location of a cell's DNA. Two other critical organelles are mitochondria and chloroplasts, which play important roles in energy conversion and are thought to have their evolutionary origins as simple single-celled organisms.
