Essential Genetics

1. Mendel's principle that states that each organism has two factors that control each of its traits
3. The inheritance pattern in which two different alleles for a trait are expressed unblended in the phenotype of heterozygous individuals.
4. Tool used to predict the probability of inherited traits in offspring by crossing their alleles
6. The general term for an allele that masks the presence of another allele in the phenotype
12. 46 threadlike structures inside your nucleus that contain thousands of genes
13. A genotype consisting of two different alleles of a gene for a particular trait.
15. Mendel's Law of genetic inheritance stating that different pairs of genes are passed to offspring independently so that new combinations of genes, present in neither parent, are possible.
17. Section of a chromosome that determines a specific trait of an organism
18. The study of gene structure and action and the patterns of inheritance of traits from parent to offspring.
19. The observable or detectable characteristics of an individual organism; the detectable expression of a genotype.
20. A genotype consisting of two identical alleles of a gene for a particular trait.

2. The inheritance pattern in which two different alleles for a trait are expressed as blended or in-between.
5. The term for a genotype in which there are two recessive alleles.
7. An alternate form of the same gene.
8. The passing on of characteristics from parent P1 to offspring F1
9. The genetic makeup of an individual for a trait or for all of his/her inherited traits—not the observable or detectable characteristics.
10. A trait that is determined by the combined effect of more than one gene
11. He acquired his understanding of genetics mostly through pea plant breeding experiments.
14. The term for a genotype in which there are two recessive alleles.
16. Mendel's Law of genetic inheritance stating that, for any particular trait, the pair of genes of each parent separate and only one gene from each parent passes on to an offspring.