Question

1) Why do we say that homozygous plants produce pure progeny?
2) DNA has a property that it is used as a tool in genetic engineering. Mention the property.
3)All dead organisms do not leave their fossil records,but in some cases their fossils are formed. How do these fossil records form a direct evidence of past happenings?
4) A family is wasting lots of resources by running water taps,keeping their AC,TV,laptop etc on throughout the day. You are upset on seeing all this and want to do something about it.
a) How will you convince them about not to waste resources? Give three arguments that you will use.
b)State any three values that are inculcated with such approach.
5) Define heterozygous

Answer 1

1)homozygous plants produce pure progeny because their both alleles indicate same protein for genes in expressing the trait.
2) Complementarity.
3)fossils set as a direct evidence for evolution by providing sources of information related to the charcterstics of the organism which might share a common ancestry with another.