BIO380H5 Lecture Notes - Lecture 13: Monosomy, Down Syndrome, Polyploid
Document Summary
Bio 380 developmental disorders: parental age, season of the year, race, country of residence, families tendencies. Abnormalities in the number of chromosomes: polyploidy, monosomy turner"s syndrome, trisomy down syndrome. Abnormal chromosome structure: cri-du-chat syndrome (short arm of chromosome 5) Genetic mutations: based on whether the chromosomes are dominant or recessive. Trauma, if there is a fibrosis in the embryonic sac and some limbs are growing, there will be a problem. Accessory lobe of placenta (you have one small piece of placenta: after the delivery of the fetus, the delivery of the placenta is next. If the accessory lobe is left, the uterus will not be able to contract fully. The placenta is not directly attached to the umbilical cord (velamentous insertion) As long as the egg is implanted in the uterine cavity, the pregnancy is normal. The male pro-nucleus is more responsible for the development of the placenta.
