Meiosis and variation

1. The number of chromosomes in a human muscle cell is 46, so how many are in a human egg cell?
   1. 24
   2. 46
   3. 92
   4. 23
2. If an organism's diploid number is 24, then it's haploid number is what?
   1. 24
   2. 48
   3. 12
   4. 36
3. Which phase is it when homologous chromosomes line up in the middle of the cell?
   1. Anaphase II
   2. Metaphase I
   3. Metaphase II
   4. Anaphase I
5. Gametes would have which of the following:
   1. Twice the number of chromosomes found in body cells
   2. Half of the number of chromosomes found in body cells
   3. Homologous chromosomes
   4. The same number of chromosomes found in body cells
6. Crossing over accomplishes what?
   1. Identical sister chromatids
   2. Genetic recombination
   3. DNA replication
   4. Fertilization
7. Which of the following is NOT true about the chromosomes in your body?
   1. Exists in 46 pairs
   2. Exists in 23 pairs
   3. Includes 2 sex chromosomes
   4. Includes 46 total chromosomes
8. The structure with 4 chromatids is known as
   1. Chromatid
   2. Tetrad
   3. Homologous chromosomes
   4. Chromosome
9. What is the correct definition of homologous chromosomes
   1. paired chromosomes that have the same genes at the same loci, but possibly different alleles.
   2. paired chromosomes that are identical to each other
   3. paired chromosomes with different genes on them
   4. paired chromosomes that both come from the mother

Answer Key

1. D) 23
2. C) 12
3. B) Metaphase I
4. C)
5. B) Half of the number of chromosomes found in body cells
6. B) Genetic recombination
7. A) Exists in 46 pairs
8. B) Tetrad
9. A) paired chromosomes that have the same genes at the same loci, but possibly different alleles.