Income is how much money u make
Answer: option B - some gametes may have an extra copy of some genes.
Explanation:
Actually, nondisjunction occurs in meiosis and results in FOUR ABNORMAL GAMETES/DAUGHTER CELLS: two gametes have an EXTRA copy of gene e.g XXY, while two other gametes LACK a required copy e.g XO
So, the right answer is some gametes may have an extra copy of some genes.
Answer:
The answer is C. Serum glycosylated hemoglobin (Hb A1c) .
Explanation:
The serum glycosylated hemoglobin (Hb A1c) test is a diagnostic method used to evaluate the amount of glucose attached to the hemoglobin in blood. This technique is often applied to test the average amount of glucose attached to the hemoglobin in past three months, thus it can be applied for diabetes or pre-diabetes test. Therefore, it is the most reliable diagnostic test in this case.
Answer: All the statements of the question are correct.
Sickle cell disease is an autosomal recessive disorder that is characterized by formation of defective hemoglobin protein, which results in sickle shaped RBC ( red blood cell).
This disease is caused by mutation in the gene that is responsible for the protein hemoglobin ( which transport oxygen throughout body).
It is inherited by the offspring when both the mutated copy of genes ( one from each parent) are passed to him.
Carriers of the disease exhibit increased resistance to malarial parasites by controlling the level of free haem in the blood ( through enzyme heme oxygenase that produces a toxic carbon monoxide gas). The resistance thus developed, is a mutation.
Therefore, all the statements in the given question are correct.
