1
					2												3
																							4
										5					6
				7																								8
			9				10													11
														12						13
									14
15
																			16
	17
						18																			19
																						20
			21							22
	23			24																								25
						26				27
	28
														29
	30
31																	32
														33			34
35

Across 2. chromosome that contains genes for characteristics not directly related to the sex of the organism. 6. likelihood that a particular event will happen. 9. chromosome that directly controls the development of sexual characteristics. 11. cell that has only one copy of each chromosome. 14. sex cell; an egg or a sperm cell. 15. any of the alternative forms of a gene, that occur at a specific place on the chromosome. 16. haploid cell produced during meiosis in the female or many species; these cells have little more than DNA and eventually disintegrate. 17. male gamete. 18. cross, or mating between organisms that involves only one pair of contrasting traits. 20. specific region of DNA that codes for a particular protein. 21. mating of two organisms. 22. form of nuclear division that divides a diploid cell into haploid cells; important in forming gametes for sexual reproduction. 24. cross between organisms involving two pairs of contrasting traits. 27. model for predicting all possible genotypes resulting form a cross, or mating. 28. cross between an organism with unknown genotype and an organism with a recessive phenotype. 30. allele pairs separate from one another during gamete formation. 31. process by which gametes are produced through the combination of meiosis and other maturational changes. 32. characteristic of having two different alleles that appear at the same locus of sister chromatids. 33. type of organism whose ancestors are genetically uniform. 35. cell that makes up all the body tissues and organs, except the gametes.

Down 1. allele that is not expressed unless two copies are present in an organism's genotype. 3. exchange of chromosome segments between homologous chromosomes during meiosis. 4. cell that has two copies of each chromosome, one from an egg and one from a sperm. 5. allele that is expressed when two different alleles are present in an organism's genotype. 7. process by which two gametes fuse and offspring that are a genetic mixture of both parents are produced. 8. collection of all of an organism's physical traits. 10. characteristics of having two of the same alleles at the same locus of sister chromatids. 12. study of heredity patterns and variation of organisms. 13. Organisms inherit two copies of genes, one from each parent and organisms donate only one copy of each gene in their gametes. 19. tendency for genes located close together on the same chromosome to be inherited together. 20. all of an organism's genetic material. 23. fusion of an egg and a sperm cell. 25. chromosomes that have the same length, appearance, and copies of genes, although the alleles may differ 26. characteristic that is inherited. 29. collection of all of an organism's genetic information that codes for traits. 34. female gamete.