Principles of Inheritance and Variation — BIOLOGY STD 12 Science — Question

Give the sex-chromosomal complement of the following organisms :
(i) Male grasshopper, (ii) Female fruit fly, (iii) Male sparrow, (iv) Female butter fly, (v) Human female with Turner's syndrome, (vi) Human super male.

What is resource partitioning? Give an example.

What is double fertilization?

Where do the following events occur in the life-cycle of Plasmodium?

1. Gametocyte development.
2. Sexual reproduction.
3. Asexual reproduction.

For the MN-blood group system, the frequencies of M and N alleles are 0.7 and 0.3, respectively. The expected frequency of MN-blood group bearing organisms is likely to be:

What is the chemical nature of biogas? Name an organism which is known to be employed in biogas.

What do you understand by IUD? Write its various types and also describe the non-medicated IUD.

What is the category virus that carries the enzyme reverse transcriptase? What is the purpose of this enzyme?

Name the cells that produce antibodies. Explain the main functions of these compounds.

Fill in the following labels with the type of cell function.