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Serga [27]
2 years ago
13

Hypothesize why DNA replication has such accuracy

Biology
1 answer:
andrew-mc [135]2 years ago
4 0
DNA replication has such accuracy varies. There are many DNA polymerases/repair enzymes that synthesize/repair DNA. Some are more frequent than others. The error frequency ranges between 1 to per 10,000 base pairs to 1 to per 10,000,000 base pairs, depends on the enzyme
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The diagram represents a dihybrid cross between two pea plants heterozygous for both seed color and seed shape. mc021-1.jpg What
bija089 [108]
The correct answer is 9:3:3:1

When two homozygotes for two traits cross, the phenotypic ratio of the offspring is 9:3:3:1 ( unless other factors like epistatic interaction change the inheritance model).
In our case, we have two simple traits of seed color and seed shape that follow the Mendelian model of inheritance.

In this dihybrid cross, we have
9/16 of the offspring expressing both dominant traits ( yellow and round seeds)
3/16 expressing one dominant and one recessive trait ( yellow and wrinkled)
3/16 expressing the other dominant and recessive trait (green and round)
1/16 expressing both recessive traits ( green and wrinkled)

5 0
2 years ago
Read 2 more answers
A child with cystic fibrosis has an altered protein in his cells that stops chloride ions from leaving the cells. This protein m
Juliette [100K]
The  altered  protein  affected  the  function   of  the  cell  membrane. The   cell  membrane which  contain  a  bilayer control  the  movement  of  substance   in  and  out  of  the  cell and organelles.  Due   to  this  it  is  selective  permeable  to ion  and  organic  molecules.
8 0
2 years ago
Read 2 more answers
Evolutionary theory contends that genetic ___________ is necessary and beneficial for humanity when there is an environmental ch
Anni [7]

Answer:

variation

Explanation:

Genetic variation is what makes us all unique as a result of subtle changes in our DNA.  The Theory of Evolution is a process in which organisms change over time as a result of adapting to their environment.  Charles Darwin came up with the term Survival of the fittest, in any environment plants and animals from the same species show natural variation in their physical characteristics, like neck lengths in giraffes.  Darwin suggested that the plants and animals best suited to the environment will survive and pass on their characteristics to their offspring. Over time, the characteristics of the surviving members of the species will become predominant.

Example: Peppered moth

In London in the 1800's, 98% of peppered moths had light colored bodies and only 2% were dark.  The light moths were the same color as the trees so they could easily hide from hungry birds and not get eaten.  The dark moths however were easy to see and were eaten.  Then came the factories and smoke of the industrial evolution and many trees turned black with soot and suddenly the dark moths were able to survive better as they now looked like the trees and the light colored moths were easier to spot and eat.  By 1895 the dark peppered moths made up 95% of the population and the light colored moths only 5%.  This is an example of natural selection, because of the gene that makes the moths dark, it allowed them to flourish when the environment changed, they adapted, reproduced and survived.

8 0
1 year ago
) which ph best describes the environment of the stomach when stimulated?
astraxan [27]

When the stomach is stimulated, its environment would be describe as acidic. The stomach releases proteases enzyme and hydrochloric acid to help in digestion. The presence of hydrochloric acid will maintain low pH of the stomach, which make the enzyme proteases to work best in cleaving proteins. After the meal has been digested, the stomach pH returns to its resting level. Therefore, the stomach secretes acid in response to food that aids in proper digestion.

6 0
2 years ago
Arrange the following organisms in order from earliest to latest appearance: amphibians, jawless fish, trilobites, bony fish.
Semmy [17]

Answer:

1) Trilobites

2) Jaw-less fish

3) Bony fish

4) Amphibians

<em>Note: May have gotten 2 and 3 mixed up.</em>

7 0
2 years ago
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