STD 12 - 1. sexual reproduction in flowering plants — BIOLOGY STD 12 Science — Question

Down’s syndrome is due to:

Suresh and Rajesh have defective haemoglobin due to genetic disorders. In Suresh, the problem is qualitative as he is having incorrectly functioning globin molecules while in Rajesh the problem is quantitative as he is having very few globin molecules. Identify the disorder they are suffering from.

	Suresh	Rajesh
A	Thalassemia - Autosomal Dominant blood disorder	Sickle Cell Anaemia - Autosomal linked Recessive trait
B	Sickle Cell Anaemia - Autosomal linked Dominant trait	Thalassemia - Autosomal Recessive blood disorder
C	Sickle Cell Anaemia – Autosomal linked Recessive trait	Thalassemia – Autosomal Recessive blood disorder
D	Thalassemia - Autosomal Dominant blood disorder	Sickle Cell Anaemia - Autosomal linkedDominant trait

Which of the following is not the belief of an organic farmer?

Wildlife conservation means the protection and preservation of:

Which of the following is a primary consumerin maize field ecosystem ?

When the inner half of the oospore after the first division develops into an embryo and outer half develops into suspensor. This type of development is called

The monohybrid genotypic ratio is:

The process by which ova are formed is knwon as