Meiosis and variation

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

Answer Key

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