Across
- 6. Two-step reduction division that produces four haploid nuclei
- 8. Process that inactivates all but one X chromosome in a cell
- 9. Dark spot in an interphase nucleus representing an inactivated X chromosome
- 10. Three copies of a chromosome instead of two
- 11. A change in chromosome number involving multiples of a full haploid set
- 12. Failure of chromosomes to separate properly at the first or second meiotic division
- 14. A chromosome number that is not an exact multiple of the haploid set
- 15. Only one copy of a chromosome instead of two
Down
- 1. Having one set of chromosomes (n = 23 in humans)
- 2. Having the normal chromosomal makeup of an individual
- 3. An organized picture of a person’s chromosomes used to detect abnormalities
- 4. A “colored body” counted by the number of centromeres
- 5. Division that produces two genetically identical diploid daughter cells
- 7. Having 69 chromosomes, a full third set, often from dispermy
- 13. Pairing of homologous chromosomes in prophase I of meiosis