Meiosis and variation

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

Answer Key

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