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BARSIC [14]
3 years ago
9

What is the relationship between a hox gene position on a chromosome and the physical appearance of an organism

Biology
1 answer:
blsea [12.9K]3 years ago
7 0

Answer:  

Hox genes are thus a subset of the homeobox transcription factor genes. In many animals, the organization of the Hox genes in the chromosome is the same as the order of their expression along the anterior-posterior axis of the developing animal, and are thus said to display colinearity.

Explanation:

Hox genes, a subset of homeobox genes, are a group of related genes that specify regions of the body plan of an embryo along the head-tail axis of animals. Hox proteins encode and specify the characteristics of 'position', ensuring that the correct structures form in the correct places of the body.

Chromosomes are thread-like structures present in the nucleus, which carries genetic information from one generation to another. They play a vital role in cell division, heredity, variation, mutation, repair and regeneration.

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3) identify and describe three abiotic characteristics of ecosystems. Give an example of how each
HACTEHA [7]

Answer:

The abiotic characteristics of an ecosystem that affects man includes: Land surface, rainfall and relative humidity.

Explanation:

In the ecosystem, man occupies the terrestrial habitat which is affected by the abiotic factors listed above.

Abiotic (non- living) factors determine the type of biotic (living) community that is found in an ecosystem. These factors include Land surface, rainfall and relative humidity, just to mention a few.

--> LAND SURFACE: This is responsible for the marked variation in the vegetation of a place. For example, a mountain in the tropics may have a rain forest vegetation at it's base and an afroalpine vegetation near its peak. The gradient of the slope affects the growth of organisms. A steep slope encourage fast run - off of water and therefore encourages erosion, which results in shallow and infertile soil. This in turn AFFECT man's farming activities as there would be little to no crop yield.

--> RAINFALL: Water is a very important abiotic factor that affects life. The main source of water to terrestrial habitat is rainfall. When rain falls, a greater percentage of it sinks into the soil while the rest run- off into water bodies. Water is absorbed by root hairs into the plant and used for photosynthesis to produce food. The absence of rainfall in the environment of man could lead to drought which AFFECTS man negatively.

--> RELATIVE HUMIDITY: This is a measure of the amount of moisture in the atmosphere. It's usually high in hot wet regions. It affects the rate at which water evaporates from the body surfaces of organisms. Low relative humidity cause more water (sweat) to evaporate from body surfaces giving the human body a cooling effect. But in high relative humidity, the sweat cannot evaporate leaving the body feeling hot and sticky. This AFFECTS man as the body tries to cool off in a harder way by increasing rate of respiration and depth of blood circulation.

3 0
2 years ago
Do you think there are always clear solutions to environmental problems? explain your response.
Shtirlitz [24]

Answer: Yes

Environmental problems like pollution has a solution. To curb this, measures must be put in place in making sure waste management agencies are establish. The work of these agencies will be handling wastes and disposing them at the best strategic places apportioned for this very purpose which will be in the outskirt of residential areas to avoid inhaling of toxins that emanates from these rubbish.

4 0
3 years ago
Read 2 more answers
Select the correct answer.
algol [13]

Answer:

the answer is biochemistry

5 0
3 years ago
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Which statement describes the term "heterozygous"? A) The alleles are the same. B) The alleles are different. C) There is no all
Oxana [17]

Answer:

B) The alleles are different

Explanation:

Hetero- different

zygous- you can best relate it to specific kind of zygote, or fertilized egg (which has two alleles)

4 0
3 years ago
What did the banana say to the vibrator?
Tema [17]

What’s the question?

Funny joke!

7 0
3 years ago
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