Unit 4 vocab

1. Mendel's second conclusion, which states that some alleles are dominant and others are recessive
3. genetic makeup of an organism
5. two identical chromatids
8. the first generation of offspring obtained from an experimental cross of two organisms
11. short arm of chromosome
15. Situation in which one allele is not completely dominant over another allele
17. Area where the chromatids of a chromosome are attached
19. An organism's physical appearance, or visible traits.
20. threadlike structures made of DNA molecules that contain the genes

2. offspring of the F1 generation
4. the cross of two genes in which one is dominant over recessive
6. A condition in which neither of two alleles of a gene is dominant or recessive.
7. long arm of chromosome
9. The scientific study of heredity
10. A chart that shows all the possible combinations of alleles that can result from a genetic cross
11. Parental generation, the first two individuals that mate in a genetic cross
12. (genetics) an organism or cell having two sets of chromosomes or twice the haploid number
13. An organism that has two identical alleles for a trait
14. DNA segments that serve as the key functional units in hereditary transmission.
16. An organism that has two different alleles for a trait
18. Different forms of a gene