Meiosis and variation

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

Answer Key

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