Science

3. A hybrid organism has two different alleles for a trait.
4. Physical appearance, or visible traits.
7. allele One whose trait always shows up in the organism when the allele is present.
9. The first stage of the cell cycle
11. The scientific study of heredity.
15. An inheritance pattern.
17. In the next part of interphase, the cell makes an exact copy of the DNA in its nucleus in a process.
19. A new organism begins to form when egg and sperm join in the process.
21. The passing of physical characteristics from parents to offspring.
22. An organism that has two identical alleles for a trait.
23. The factors that control a trait.

1. The stage during which the cell’s nucleus divides into two new nuclei.
2. During prophase, the threadlike chromatin in the nucleus condenses to form double-rod structures.
5. Each different form of a characteristic, such as stem height or seed color.
6. A purebred organism is the offspring of many generations that have the same trait.
8. allele Hidden whenever the dominant allele is present.
10. A number that describes how likely it is that an event will occur.
12. cycle The regular sequence of growth and division that cells undergo.
13. The final stage of the cell cycle.- completes the process of cell division.
14. An organism that has two different alleles for a trait.
16. The different forms of a gene.
18. square Chart that shows all the possible combinations of alleles that can result from a genetic cross.
20. Genetic makeup, or allele combinations.