Answer and Explanation: Nondisjunction occurs when sister chromatids are not pulled apart at anaphase II. This will cause both sister chromatids/ homologous chromosomes to be pulled to just one pole of the cell.
Since the anaphase I stage in Meiosis I occurred without errors, this would result in four haploid gametes being produced.
However, two of these gametes will be normal, will have the normal number of chromosomes. The other two gametes would have an abnormal number of chromosomes and be aneuploid. One would have n+1 number of chromosomes, and the other would be n-1.
Answer:
Dust bowl resulted from extreme drying and loosening of the soil that resulted in soil erosion by wind. Thus, it can be related that poor agricultural practices like over plowing , over grazing and leaving the land barren are human activities that must have contributed to the dust bowl.
Explanation:
- Dust bowl is referred to a period in early twentieth century when the the American and Canadian prairies faced severe dust storms.
- These dust storms resulted from severe drought and failure of practices to prevent soil erosion.
- Several people and livestock died as a result of choking.
- Over plowing, removal of top soil and small grasses exposed the soil to eroding winds and caused the dust storms.
The nurse identifies from a client's prenatal record that she has a documented gynecoid pelvis. Upon the client entering the labor and delivery department, the nurse is aware that THIS PELVIS IS BEST SUITED FOR LABOR AND NORMAL DELIVERY. THE NURSE SHOULD PREPARE FOR A NORMAL LABOR WITHOUT TAKING ANY EXTRA CARE.
Gynecoid pelvis is a typical female pelvis shape which is favorable for normal birth of a baby.
p53 protein is involved in control of cell cycle, which explains it role in tumor/ cancer suppressor
