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kati45 [8]
2 years ago
11

HELPP I NEED SOME ANSWERS PLEASE ILL GIVE BRAINLIEST!

Biology
1 answer:
Lady bird [3.3K]2 years ago
6 0

Answer:

Want all of the answers or just one of them?

Explanation:

Cause' I'll give all

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A certain eukaryotic organism has multiple, distinct genes with highly similar sequences that are expressed at different times i
vlabodo [156]

These genes could have arisen by gene duplication.

<h3>What is gene duplication?</h3>

Gene duplication is the process of copying a section of DNA that codes for a gene. A retro transposition event or a recombination mistake are both potential causes of gene duplication. As a result, the duplicate gene coding may experience a significant number of modifications throughout time. This might prevent the gene from functioning or, in other situations, give the creature a benefit.

Gene duplication is a phenomenon that can happen through a variety of ways:

  • Ectopic Recombination: Uneven crossing-over between misaligned homologous chromosomes during meiosis might result in duplications. A duplication at the exchange site and a reciprocal deletion are the results of this recombination.
  • Replication Slippage: Short genomic sequences can be duplicated as a result of the replication error known as replication slippage. DNA polymerase starts copying the DNA during replication, but eventually the polymerase separates from the DNA, causing replication to stall. The replicating strand is incorrectly aligned when the polymerase reattaches to the DNA strand, which accidentally results in several copies of the same portion.
  • Aneuploidy: When a single chromosome's nondisjunction causes an abnormally high number of chromosomes, this condition is known as aneuploidy. Aneuploidy is frequently damaging and frequently causes spontaneous miscarriages in mammals. Some aneuploid people can survive. For instance, human trisomy 21 causes Down syndrome but is not lethal.

Learn more about gene duplication here:

brainly.com/question/14014915

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3 0
1 year ago
This energy flows through organisms and the environment and eventually flows out of the biosphere as
kakasveta [241]

Heat is then the by-product of the light energy from the Sun flowing through the biosphere. Organisms are inevitably dependent on sunlight to perform essential biological processes in order to sustain life. In the absence of this energy, all the organisms on Earth would die. 



8 0
3 years ago
Describe how the structure of a virus aids in its ability to infect cells
Mamont248 [21]

Answer:

A virus attaches to a specific receptor site on the host cell membrane through attachment proteins in the capsid or via glycoproteins embedded in the viral envelope. The specificity of this interaction determines the host (and the cells within the host) that can be infected by a particular virus.

Explanation:

8 0
2 years ago
Read 2 more answers
______ occurs because the nervous systems send messages to the muscles in the muscular system.
Ainat [17]

Answer:

action potentials

Explanation:

other possible answers:

electrical impulses

muscular contractions

action potentials is likely your best bet though

5 0
2 years ago
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4. Magnesium (a metal) and oxygen (a nonmetal) combine to form magnesium oxide (MgO). The atoms are held together by strong elec
Kobotan [32]

Answer:

ionic bond

Explanation:

ionic bond results from electrostatic attraction between opposite charges

6 0
3 years ago
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