biology crossword

3. process of combining the male gamete with a female gamete
4. changes produced in a single gene
8. a length off time in which a series of events takes place
9. no longer in existence
12. cell growth/"rest"
13. coiled and super coiled mass of chromatin
15. chromatids gather at opposite ends and a nuclear envelope reforms
16. long and distinct period of history
17. dating, process of determining the age of something by measuring the amount of radioactive material it contains
20. two different alleles
21. the likelihood of a particular event will occur
22. changes in one or very few nucleotides
23. cause the mitotic spindle to form
24. a specific characteristic that varies between individuals

1. loss of a part of all or a part of the chromosome
2. helix, twisted ladder formation allows to coil in on itself
5. square, graph representation of the possible genotypes of an offspring
6. record, show the process of evolution
7. division of the chromosomes in the cell nucleus
8. scientists who study fossils
10. bead-like structure formed from chromatin wound around histone protein
11. botanist and zoologist who influenced charles darwin
14. attach to the centromere of each chromosome and pull the chromatids apart
18. cytoplasm pinches off and distributes organelles to both cells
19. genes from one organism inserted into cells from a different organism