Trisomy 21, as illustrated by the karyotype, is caused by nondisjunction. This occurs when chromosomes do not separate properly during meiosis.
Answer is D) nondisjunction
<span>Humans C</span>an't Re-Grow<span> Lost Limbs or O</span>rgans<span>, but Scientists are Successfully Cultivating Miniature O</span>rgans<span>, Specialized O</span>rgan<span> Cells and Replacement Body Parts.
Ex. So Basically People Can Grow ARTIFICIALLY Grow Organs, But Only When Your Still an INFANT Because Your Organs are Still Miniature and Still in The Human Body.
Hoped That Helped </span>
<span> The answer is a misense mutation. In this case, the substitution of the tryosine amino acid with cysteine in the same position in the sequence does not affect the polypeptide becasue both tryosine and cysteine are polar animo acids. If the substitution </span><span><span> in the polypeptide chain </span>was by amino acids with different properties, it would affect the folding of the protein and change its conformation hence also affect its function. </span>
DNA replication occurs due to an enzyme. The DNA unzips, and the enzyme pieces together new parts to make each half its own full DNA strand.
