LCC Lab Exam 2 with 100% Correct Answers
2024
How many chromosomes are in a human cell? How many pairs? - ️️ - 46, 23 pairs
What characteristics do homologous chromosomes have? (what makes them a pair? - ️️
- Same size, same banding pattern, matched gene for gene
What kind of antigens ...
How many chromosomes are in a human cell? How many pairs? - ✔️✔️- 46, 23 pairs
What characteristics do homologous chromosomes have? (what makes them a pair? -
✔️✔️- Same size, same banding pattern, matched gene for gene
What kind of antigens are present in the blood of a person that is type A? What
antibodies are present? - ✔️✔️- A-antigens, anti-B antibodies
What kind of antigens are present in the blood of a person that is type AB? What
antibodies are present? - ✔️✔️- both A and B antigens, no antibodies
What kind of antigens are present in the blood of a person that is type O? What
antibodies are present? - ✔️✔️- No antigens , both anti-A and anti-B antibodies
Which kind of blood cells fight off infection? - ✔️✔️- leukocytes (white blood cells)
What is the end result of nondisjunction? When does it occur? - ✔️✔️- unequal
distribution of chromosomes, it can occur either during meiosis I or II
What does aneuploidy mean? - ✔️✔️- abnormal number of chromosomes in a cell
How does a cell's surface area to volume ratio affect the efficiency of the cell? - ✔️✔️-
Cell is most efficient with a larger SA:V ratio. As the surface area decreases and volume
increases, the cell is likely to die as diffusion is incapable of penetrating entire volume or
meeting metabolic requirements
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