DNA molecules are nucleotides which are the A, G, C, T.
A long series of the nucleotide makes up the genes. The sequence of the nucleotides determines each of our 20,000 different genes.
Every 3 nucleotides codes are for a specific amino acid. The amino acid sequence determines what protein will be made.
The proteins acting as enzymes will determine our physical traits like eye color, number of bones, blood type....etc.
B.
The most important findings of the Human Genome Project are so many nucleotide bases and the genes contained in the human chromosomes. Its potential for early detection of the genetically connected diseases is to find out through a genetic test whether you carry the gene that is associated with whatever disease …show more content…
The comparison of the two, prenatal screening and genetic testing is that they both can be tested while the baby is still in the womb.
The contraction of the two is prenatal screening is also used by an ultrasound to view images of the fetus inside the mother’s wound. Genetic testing consists of a needle inserted through the mother’s abdomen and her uterus, into the amniotic sac collecting fluid from around the baby. (PG. 61-65)
D.
During a woman’s reproductive years, each ovary nourishes several hundred egg cells, mature and become ready for fertilization. An egg cell (ovum) matures in approximately every 28 days. When a menstrual cycle comes only the one that has matured is released. At fertilization, 23 chromosomes from each, the mother and father are joined to produce a combination. So, an egg is matured, emitted from the ovary and then moves down the fallopian tube. If the egg fertilize, it will form a zygote that travels to the uterus and implant in the inner lining while continuing to develop. (PG. 84-85) …show more content…
The germinal stage consist of when conception is starts to 2 weeks which the zygote implants itself in the mother’s uterine lining. The embryonic stage begins after the second seek but begins through and out the 3rd through the last 8th week. This point the blastocyst form three cell layers in the embryo, also in this stage can occur loss of pregnancy before a baby is born alive. The last stage which is fetal stage, is period of week 9 to birth (38 to 40 weeks). During this time fetus grow rapidly in size and weight. Around 9 to 12 weeks, the baby arm movements begin, first reflexes and the sex organs develop enough for examination of the fetus. By 17 to 20 weeks mother begin to feel movements.