Compare and contrast selective breeding and genetic engineering

Selective breeding:

Selective breeding or artificial selection is a process used by humans to develop new organisms with desirable characteristics. It is the traditional method for improving crops and livestock like-increasing disease resistance or milk yield. This process result in modification of an organism's genotype.

Genetic Engineering:

This implies the modification of the characteristics of an organism by manipulating its genetic material. This also result in modification of an organism's genotype. Genetic engineering is a non traditional and faster way to transplant genes of a desired characteristic into an organism.

"menstrual cycle is a complex cycle that consists of several processes. order of occurrence of steps in menstrual cycle are as follows:

1. high progesterone levels maintain the endometrium lining of the uterus.

2. endometrium lining breaks down and low levels of estrogen stimulate the pituitary to release fsh and lh.

3. fsh and lh stimulates the follicles to develop and the oocyte to produce estrogen.

4. rising estrogen levels suppress fsh production and development of other follicles.

5. a spike in lh causes follicle to rupture.

6. a breakdown of corpus luteum causes progesterone level to drop."