Question

mitochondria

		are inherited from both parents
		are responsible for photosynthesis
		are likely of bacterial origin

maternal effects

		are likely to be stronger early in development
		follow Mendel's postulates
		are the contribution of the mother to the offsprings genotype
		are the same as cytoplasmic inheritance

gene imprinting is an example of________

		maternal effects
		extranuclear inheritance
		epistasis
		epigenetics

1. One common method of DNA imprinting is through ________

   		RNA splicing
   		DNA methylation
   		RNA editing
   		epigenetics

Answer 1

1.
The answer is option C.
The mitochondria is of bacterial origin which is believed to survive the endocytosis. It is believed they are mainly descended from sulphur containing bacteria.

2.
The answer is option A.
They are likely to be stronger in their earlier development.
The maternal effect follows a non Mendelian type of inheritance. And are the contribution to the offsprings phenotype than the genotype. They are not as same as the cytoplasmic inheritance.

3.
The answer is option D.
Genomic imprinting is an example of the epigenetic phenomena. It is independent of the normal Mendelian inheritance.
Epistaxis is the bleeding from the nose.

4.
The answer is option B.
The DNA imprinting is the epigenetic process as said above involves DNA methylation and the histone methylation in that they do not alter the genetic sequence.

Thank you...