b. How many sister chromatids are present in a cell during prophase?b c. How man

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b. How many sister chromatids are present in a cell during prophase?b c. How many chromosomes are present during metaphase Il of meiosis?- d. How many sister chromatids are present in each cell during metaphase A doctor is examining a patient's cells under a microscope to determine whether the paties retinoblastoma (a form of cancer). The doctor unfortunately notices the occurrence of nondisjunction in the cells, which is the result of unequal sister chromatids at each pole, a indicate this type of cancer. Which phase(s) of mitosis and/or meiosis are being affected? A scientist tells you that he has found a cool single celled organism that is about to divide tells you that the homologous chromosomes are not paired, and that it doesn't look like recombination has occurred. Is the organism dividing by mitosis or meiosis? (1pt) Explain how antigens and antibodies are related to each other and to blood type. (1.5p How many possible alleles are there for the ABO gene? (0.5 pt) H A.TB, At Where are antigens located? (0.5 pts) Il of meiosis? on tueSut t Cel. Je mmune etr.ce

Explanation / Answer

Q. A scientist tells you that he has found a cool single-celled organism that is about to divide tells you that the homologous chromosomes are not paired and that it doesn’t look like recombination has occurred. Is the organism dividing by mitosis or meiosis?

Ans- The organism is dividing by mitosis. The homologous chromosomes are paired are during meiosis. But, here chromosomes are not paired, so recombination does not take place.Therefore, the cell does not undergo meiosis.

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