Given below is a diagram representing a stage during the mitotic cell division. Answer the following questions.

(a) Identify the stage.

(b) Give suitable reason for your answer in (a).

(c) What changes are observed with chromosomes during stage shown in diagram?

Define corpus callosum.

Rate of photosynthesis is low at very high temperature. Mention reason.

Name the two genetic disorders in males caused due to sex-linked inheritance.