Recessive<span> and </span>dominant alleles<span>. You will recall that genes have </span>different<span> forms called </span>alleles<span>. An </span>allele<span> can be </span>recessive<span> or </span>dominant<span>. A </span>recessive allele<span> only shows if the individual has two copies of the </span>recessive allele<span>.</span>
Recessive and dominant alleles are the two different forms of a gene that are also known as gene variants.
A dominant allele (represented by capital letter allele such as T for tall pea plant) is the one that masks the expression of a recessive allele.
It shows its phenotype even when a single copy of it is present in the genotype (such as in case of Tt, which represents Tall plant).
On the contrary, a recessive allele (represented by small letter allele such as 't' for dwarf) is the one that only shows its phenotype when present in a homozygous recessive form (like tt for dwarf). This is because it is masked when present with a dominant allele.
<span>A::T and G:::C is essential. The importance to the DNA structure is that prevents lose of genes and mis-formation of encoded products (protein and mRNA).</span>
The visible bodies of water are referred to as surface water. The majority of fresh water is actually found underground as soil moisture and in aquifers. Groundwater can feed the streams, which is why a river can keep flowing even when there has been no precipitation.
The part of the root that contains transport tubes is the root hair. The primary role of the root hair is to absorb water and nutrients from the soil. They are hair-like and tubular in structure and are sometimes rarely visible by the naked eye.
