Science : Ch 09 – Heredity and Evolution

Assertion (A) : Acquired traits cannot be passed from one generation to next generation. Reason (R) : Inaccuracy during DNA copying of acquired trait is minimum.

Assertion (A) : Inheritance from the previous generation provides subtle changes in body design for the next generation. Reason (R) : Greater diversity will be generated if asexual reproduction is involved.

The gene type of green stemmed tomato plants is denoted as GG and that of purple stemmed tomato plants as gg. What colour of stem would you expect in F1 progeny when these two are crossed?

What were his fndings with respect to inheritance of traits in F1 and F2 generation by Mendle?

A woman has only daughters which

Laws of inheritance were proposed by

Select correct option about variation?

1. The differences in characteristics between individuals of the same species is called variation.
2. Variations arise in organisms during the process of copying the DNA due to which the DNA copies will be similar but not identical to the original

A cross between a tall plant (TT) and short plant (tt) resulted in progeny that were all tall plants as:

The maleness of a child is determined by:

A trait in an organism is infuenced by:

The two versions of a trait (character) which are brought in by the male and female gametes are located on:

Select the group which shares the maximum number of common characters

Choose the statements that describe the characteristics of genes:

1. Genes are specifc sequence of bases in a DNA molecule
2. A gene does not code for proteins.
3. In individuals of a given species, a specifc gene is located on a particular chromosome.
4. Each chromosome has only one gene

If the fossil of an organism is found in the deeper layers of earth, then we can predict that:

In peas, a pure tall plant (TT) is crossed with a pure short plant (tt). The ratio of pure tall plants to pure short plants in F2  generation will be: