While examining the mitotic stage in a tissue, one finds some cells with 16 chromosomes and some with 32 chromosomes. What possible reasons could you assign to this difference in chromosome number. Do you think cells with 16 chromosomes could have arisen from cells with 32 chromosomes or vice versa?

A cell has 32 chromosomes. It undergoes mitotic division. What will be the chromosome number (N) during metaphase? What would be the DNA content ( C ) during anaphase?

ASSERTION TYPE QUESTIONS : These questions consist of two statements each, printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses. A. If both Assertion and Reason are true and Reason is correct explanation of Assertion. B. If both Assertion and Reason are true but Reason is not correct explanation of Assertion. C. If Assertion is true but Reason is false. D. If both Assertion and Reason are false. . Assertion : If an endosperm cell of angiosperm contains 24 chromosomes, the number of chromosomes in each cell of rootwill be 16. Reason : As endosperm is triploid and root cells are diploid, the chromosome number in each of root cell will be 16.

Study the figure given Name 'a' and 'b' cells. What is the difference between them with reference to the number of chromosomes ?

Do you think Mendel's laws of inheritance would have been different if the characters that he choose were located on the same chromosome?

Find out the false (F) statement from the following: All bacteria have single circular chromosome per cell.

One day in the morning, Ramesh filled up 1/3 bucket of hot water from geyser, to take bath. Remaining 2.3 was to be filled by cold water (at room temperature) to bring mixture to a comfortable temperature. Suddenly Ramesh had to attend to something which would take some time say 5 - 10 minutes before he could take bath. Now the he had two options: (i) fill the remaining bucket completely by cold water and then attend to the work, (ii) first attend to the work and fill the remaining bucket just before taking bath. Which option do you think would have kept water warmer ? Explain.

QUESTIONS FROM STATE BOARD EXAMINATIONS: A There are 16 chromosomes in a vegetative cell of pea plant. How many chromosomes will be in the following: (i) Pollen grain (ii) Endosperm (iii) Antipodal (iv) Egg cell