1. The more characteristics two species have in common ?

More closely they are related and more distantly they have common ancestors.

More distantly they are related and more distantly they have common ancestors.

More closely they are related and more recently they had a common ancestors.

More distantly they are related and more recently they have common ancestors.

Answer: More closely they are related and more recently they had a common ancestors.

Explanation:


2. Basket of vegetables contains carrot, potato, radish and tomato. which of them represent the correct homologous structures ?

Carrot and potato

Radish and potato

Carrot and tomato

Radish and carrot

Answer: Radish and carrot

Explanation:


3. If a couple has three daughters, what are the chances that the fourth child will be a son ?

0%

50%

75%

100%

Answer: 50%

Explanation:


4. The F2 phenotype ratio of a monohybrid cross studied by Mendel is ?

4:1

3:1

2:1

1:1

Answer: 3:1

Explanation:


5. Which of the following statement is or are correct ?

The gene which decides the appearance of an organism even in the presence of an alternative gene is known as dominant gene.

Gregor Mendel was the first scientist to make a systematic study of patterns of inheritance which involved the transfer of characteristics from parents to progeny.

The gene which can decide the appearance of an organism only in the presence of another identical gene is called a recessive gene.

All the above

Answer: All the above

Explanation:

all the statements are correct. Hence, your answer will be option [D]. tors that live on this earth long, long ago.


6. In humans if gene B gives brown eyes and gene b gives blue eyes, what will be the colour of eyes of the persons having combinations (i) Bb and (ii) BB ?

(i) Blue and (ii) Blue

(i) Brown and (ii) Brown

(i) Brown and (ii) Blue

(i) Blue and (ii) Brown

Answer: (i) Brown and (ii) Brown

Explanation:


7. Pure-bred pea plant A is crossed with pureĀ¬bred pea plant B. It is found that the plants which look like A do not appear in Fj geneĀ¬ration but re-emerge in F2 generation. Which of the plants A and B are tall and dwarf ?

A are dwarf and B are also dwarf

A are dwarf and B are tall

A are tall and B are also tall.

A are tall and B are dwarf.

Answer: A are dwarf and B are tall

Explanation: