NEET BIOLOGY

Detailed explanation-1: -Characteristics controlled by a single gene (one copy inherited from each parent) tend to have phenotypes that fall into separate categories. They show discrete variation.

Detailed explanation-2: -Variation between individuals of a species can be grouped into two large categories: discrete and continuous. Discrete variation is either/or and is often caused by the presence or absence of a small number if genes. For example, our ability to “roll” our tongues is determined by just one gene.

Detailed explanation-3: -Discontinuous variation refers to the differences between individuals of a species where the differences are qualitative (categoric) Continuous variation is the differences between individuals of a species where the differences are quantitative (measurable)

Detailed explanation-4: -Discrete, or discontinuous, traits are controlled by a small number of genes, often only one. These genes generally have two alleles. For instance, Mendel’s pea seeds had two alleles for shape: smooth or wrinkled. An example of human alleles is seen with freckles; each person has a freckled or non-freckled allele.

Detailed explanation-5: -Single gene inheritance refers to the inheritance of traits caused by only one gene pair. This is also known as Mendelian genetics, named for the early, famous geneticist Gregor Mendel.