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STatiana [176]
3 years ago
13

What happens to a zygote after it forms and begins to develop

Biology
1 answer:
Free_Kalibri [48]3 years ago
4 0

In humans, it takes about four days for a zygote to become a  morula  and another three days until the embryo attaches itself to the mother's uterine wall.

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How are Eisenhower's leadership qualities as Supreme Commander of the Allied Forces on D-Day characterized?
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The canopy in tropical forests is single layered, allowing light penetration throughout the forest floor.
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Stone Mountain was formed during the formation of the Blue Ridge Mountains around 300-350 million years ago and is considered pa
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Answer:

Stone Mountain was formed during the formation of the Blue Ridge Mountains around 300-350 million years ago and is considered part of the Appalachian Mountains.

Explanation:

4 0
2 years ago
Please explain the difference between a frameshift mutation and a base substitution mutation.
harina [27]

Answer:

A frameshift changes every codon past it. A base substitution only changes one codon.

Explanation:

DNA is comprised of nucleotides (A, C, T, G) that make up amino acids. Every three bases is called a codon and represents an amino acid.

In a frameshift mutation, a nucleotide is either added or deleted from the sequence. This offsets the entire sequence after it because the reading frame shifts. Here's an example:

ACTGCTATCGTCATC

If another T is added in between the first and second codons, then every codon after will be changed.

ACT>T<GCTATCGTCATC

A substitution mutation is usually less severe, as it only alters one codon in the sequence. These occur when one nucleotide is replaced by another one. Here's an example:

ACTGCTATCGTCATC

Let's say the first G is replaced by a T.

ACT>T<CTATCGTCATC

As you can see, none of the other codons changed.

Typically, a frameshift mutation is considered worse than a substitution mutation.

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3 years ago
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