Alleles are different versions of genes. I hope this helped :)
Sickle cell anemia is caused by a single letter mutation so transcription will lead to synthesis of a different <u><em>mRNA</em></u> molecule . The different mRNA molecule will lead to a different <em><u>protein</u></em> where a single amio acid is different(there is valine instead of glutamic acid)
Dandelion seeds are dispersed by the wind It uses the warmth water and light to grow The structure of the flower when it sets seed allows the lightness of the seed and its sail to be dispersed in the wind. They are spread by the wind. When the flower matures from its usual yellow, the seeds, sporting tiny white 'parachutes' are blown about by the wind - often for considerable distances. Because it's a sperm wind, birds, and humans Yes it can. they reproduce by forming tiny cells that can grow into new plants, <span>which are called spores.</span><span>
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During DNA replication, the hydrogen bonds must be broken between the complementary nitrogenous bases in the DNA double helix
<span>4. Species
</span><span>Allopatric speciation is were a single species has been separated so long they have both evolved slightly in different "directions" that prevent them from breeding after being reintroduced.</span>
