Answer:
meiosis
Explanation:
Down syndrome is an abnormality that occurs on chromosomes 21, it occurs because chromosomes 21 cannot be separated in meiosis, the pair of chromosomes 21 do not separate and go together to one of the daughter cells. In this way, the oocyte or the resulting sperm will have 24 chromosomes instead of 23. When in conception that oocyte or sperm joins the germ cell of its partner that contributes the 23 chromosomes, the total sum of chromosomes that will have the first cell of the new conceived being will be 47.
When compared to each other, bird wings and butterfly wings can be described as ANALOGOUS STRUCTURES,
Analogous structures are those body structures in animals, which are used to perform similar functions but which have different evolutionary history. They are also called convergent structures. These structures are formed as a result of the need for the animals to adapt to similar environmental conditions. For instance, both bird and butterfly use their wings for flying.
When DNA replicates, each strand of the original DNA molecule is used as a template for the synthesis of a second is known as complementary strand. 5' side on top, broken arrow 3' side on bottom, non-continuous arrow called lagging strand. Continuous strand to 5 to 3 in complementary called as leading strand.
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what is Okazaki fragments?
The Okazaki fragments also known as lagging strand that are joined together by the enzyme DNA ligase.
These leading and lagging strands only formed in the DNA replication and DNA polymerase is the enzyme which helps in DNA dependent replication. DNA polymerase forms two identical DNA strands from a single DNA molecule.
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Human rights and equality. One of the EU's<span> main </span>goals<span> is to promote human rights both internally and around the world. Human dignity, freedom, democracy, equality, the rule of law and respect for human rights: these are the core values of the </span>EU<span>.
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