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Across 5. Offspring resulting from interbreeding of the hybrid F1 generation. 6. A number that describes how likely it is that an event will occur 8. Describes a trait that covers over, or dominates, another form of that trait. 10. An organism that has two identical alleles for a trait 11. combined effect of two or more genes on a single character 12. An organism's genetic makeup, or allele combinations. 13. A gene that has more than two alleles 17. A segment of DNA on a chromosome that codes for a specific trait 18. the scientific study of heredity 19. An allele that is masked when a dominant allele is present 20. Mendel's law that states that the pairs of homologous chromosomes separate in meiosis so that only one chromosome from each pair is present in each gamete 21. Passing of traits from parents to offspring. 22. A condition in which neither of two alleles of a gene is dominant or recessive 23. An organism's physical appearance, or visible traits.

Down 1. An alternative form of a gene. 2. the first generation of offspring obtained from an experimental cross of two organisms 3. Each member of a pair of homologous chromosomes separates independently of the members of other pairs so the results are random. 4. A cross between individuals that involves one pair of contrasting traits 7. If an monohybrid cross organism has a certain characteristic that is always passed on to its offspring, we say that this organism bred true with respect to that characteristic. 9. A pattern of inheritance in which two alleles, inherited from the parents, are neither dominant nor recessive. The resulting offspring have a phenotype that is a blending of the parental traits. 11. A chart that shows all the possible combinations of alleles that can result from a genetic cross 14. A diagram that shows the occurrence of a genetic trait in several generations of a family. 15. The parent generation 16. An organism that has two different alleles for a trait