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2 years ago

Occasionally a child is born with an extra chromosome 13, but never do you see a child with an extra chromosome 12, why?

1 answer:

3 0

This is because some of the trisomies (one extra chromosome, three instead of two) are fatal, births cannot survive.

Theoretically, trisomies can occur with any chromosome, but often result in miscarriage.

The types of autosomal trisomy that survive to birth in humans are:

Trisomy 8 or Warkany syndrome 2

Trisomy 9

Trisomy 13 or Patau syndrome

Trisomy 18 or Edwards syndrom

Trisomy 21 or Down syndrome.

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Remember the law of conservation of mass. The human body uses cellular respiration to make energy. Using the chemical equation f

posledela

With the equation of cellular respiration C₆H₁₂O₆ + 6O₂ → 6CO₂+ 6H₂O, gaseous exchange takes place, glucose reacts with oxygen forming Adenosine Triphosphate used by cells.

About 21% of oxygen and 0.4% of carbon dioxide of air is inhaled while the air we breathe out contains 16.4% of oxygen and 4.4% of carbon dioxide because cells use oxygen inhaled to release energy and carbon dioxide as byproduct.

<h3>How does Cellular Respiration work?</h3>

Cellular respiration is how organisms convert fuel into energy and nutrients by combining oxygen with food molecules, sending the chemical energy for life sustaining activities while expelling carbon dioxide and water.

We inhale 21% of oxygen and 0.4% of carbon dioxide and exhale 16.4% of oxygen and 4.4% of carbon dioxide as by product during the process of cellular respiration.

Find out more on cellular respiration here: brainly.com/question/25921566

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8 months ago

Around 40% of cats with white fur and blue eyes are deaf. The gene responsible is pleiotropic. What does this mean?

Fed [463]

Pleiotropy occurs when one gene influences multiple, seemingly unrelated phenotypic traits. A single gene is responsible for pigmentation and hearing.

8 0

3 years ago

Read 2 more answers

RNA can be described as what? O 1. short, single strands 0 2. short, double stranded O 3. long, single strands 4. long, double s

myrzilka [38]

Answer:

1. short, single strands

Explanation:

Unlike DNA, RNA is single-stranded. A strand

3 0

2 years ago

WILL GIVE A BRAINLEST

natka813 [3]

<h3><u>Answer;</u></h3>

absorbed by Earth’s core

When energy from the sun reaches Earth, it is not <em><u>absorbed by Earth's core.</u></em>

<h3><u>Explanation;</u></h3>

<em><u>The energy from the sun reaches the earth, such that 23 percent of the incoming solar radiation is absorbed by the atmosphere by water vapor, dust and ozone. </u></em>
<em><u>48 percent of the solar energy is absorbed by the earth's surface, this translates to 71 percent of the energy which is absorbed by the systems of the Earth.</u></em>
<em><u>The remaining 29 percent is reflected back to space by clouds, atmospheric particles etc. </u></em>

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3 years ago

Read 2 more answers

Use the drop-down menus to answer the questions about genetic recombination. involves the transfer of genetic material from one

Tresset [83]

The right matches are:

• Involves the transfer of genetic material from one bacteria to another ==> Genetic recombination (all 3).

• Involves scraps of genetic material ==> Transformation.

• Uses a virus to transmit genetic material ==> Transduction.

• Uses a pilus to transmit genetic information ==> Conjugation.

• Introduces new genetic material to a bacterium ==> Genetic recombination (all 3).

In molecular biology the term genetic recombination is often used as a synonym for DNA recombination, that is, the processes by which one DNA (or RNA) molecule is cut off, then joined to another.

There are three possible mechanisms in the bacterium: bacterial conjugation, bacterial transformation and transduction.

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2 years ago