| 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.
|
||
View Answer
Discuss in Forum
Report Question| 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
|
||
| 3. | If a couple has three daughters, what are the chances that the fourth child will be a son ? | |
|
0%
|
||
|
50%
|
||
|
75%
|
||
|
100%
|
||
| 4. | The F2 phenotype ratio of a monohybrid cross studied by Mendel is ? | |
|
4:1
|
||
|
3:1
|
||
|
2:1
|
||
|
1:1
|
||
| 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
|
||
| 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
|
||
| 7. | Pure-bred pea plant A is crossed with pure¬bred pea plant B. It is found that the plants which look like A do not appear in Fj gene¬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.
|
||