Science : Ch 09 – Heredity and Evolution

A single copy of ‘T’ is enough to make the plant tall whereas both copies have to be ‘t’ for the plant to be dwarf. Therefore, Tallness is a dominant trait whereas dwarfness (t) is a recessive trait

All ofsprings of F1 generation were tall with round seeds which shows that both Tallness and round seed are dominant traits. However, new combinations were seen in F2 generation which showed that the tall/ short trait and the round/wrinkled seed trait are independently inherited

The Foremost attribute are always supreme. Tallness is a dominant trait as a single copy of ‘T’ is enough to make the plant tall, while two copies have to be ‘t’ for the plant to be short.

Radish and carrot represent the correct homologous structures because both have similar design or structure, though both are of different species.

The size of the body is an acquired trait because it depends on nutritional status, health conditions, etc. It can change depending on the Components like availability of less or more food.

The wings of an insect and a bird have distinct structures but they carry out the same function of fying. Therefore, they are analogous organs

The character of the cross will be cross fertilization, which is the transfer of pollen from one plant to the stigma of fower; borne on a distinct plant of the same species.

A species is a group of organisms consisting of similar individuals which can breed Jointly and produce fertile ofspring.

Asexual reproduction will not result in variation as there are no gametes involved. Movement of individuals from one habitat to another will not afect the DNA.

The pair of sex chromosomes is odd as it is not a perfect pair. Women have a perfect pair of sex chromosomes, both called XX while men have a mismatched pair in which one is a normal sized X and the other is a short one called Y.