Q27 of 30 Page 1

Name the prominent South Indian and North Indian species of sugarcane used for cross breeding. List the desired qualities of the hybrid cane obtained from this cross.

The prominent South Indian and North Indian species of sugarcane used for cross breeding are Saccharum officinarum and Saccharum barberi respectively.

The desired qualities of the hybrid obtained from this cross are:


a) higher sugar content


b) thicker stem


c) ability to grow in the sugar cane areas of north India.


More from this chapter

All 30 →
25

How is the Bt cotton plant created as a GM plant? How is it protected against boll worm infestation?

 26

(a) Explain triple fusion in angiosperm.

(b) Write the fate of the products of this fusion in the mature fruit of coconut.


 28

(a) Explain the process of microsporogenesis in angiosperms.

(b) Draw a labelled diagram of a mature pollen grain.


OR


When does oogenesis start in humans? Name the three hormones and their source linked with oogenesis. How do they influence the processes of oogenesis? Explain.


 29

Given above is the schematic representation of lac operon of E.coli. Explain the functioning of this operon when lactose is provided in the growth medium of the bacteria.

OR


Using Punnett square show the F2 results of a dihybrid cross where the pure breed parents have contrasting traits with reference to seed shape and seed colour in Pisum Sativum. Give the phenotypic ratio.