Genetics Extra Credit

4. A genetic cross that examines two traits at the same time
6. A trait controlled by multiple genes that results in a wide range of variation
9. The structure formed when homologous chromosomes pair up during meiosis I
10. An organism with genotype Aa that shows the dominant trait
14. The inheritance pattern shown when red and white flowers produce pink offspring
15. The observable physical characteristics of an organism
18. A trait that appears more often in males because it is carried on the X chromosome
19. The random alignment of homologous chromosome pairs during metaphase I

1. Chromosome pairs that carry the same genes but may have different alleles
2. The cell formed when two gametes fuse together
3. The diagram used to predict offspring ratios in a genetic cross
5. An individual who carries a recessive allele without expressing the disorder
7. The inheritance pattern in which both alleles are fully expressed, such as AB blood type
8. The exchange of genetic material between homologous chromosomes during prophase I
11. A cell containing half the number of chromosomes
12. The Mendelian principle stating that allele pairs separate during gamete formation
13. A cell containing two complete sets of chromosomes
16. The error that occurs when chromosomes fail to separate properly during meiosis
17. A family diagram used to track inheritance of a trait through generations