Meiosis and variation

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

Answer Key

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