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BIO 112 Review
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Across
Down
4. Allele that controls a trait
6. Two-letter symbols representing the types
of genes present in an organism
9. Proteins that assist in coiling DNA (DNA
wrapped around these)
13. Whip-like tail structure on mature sperm
cells
15. 'Father of Genetics'
16. The specialized form of gametogenesis in
males
18. A fertilized egg
19. The likelihood that a possible future event
will occur
21. When pollen (sperm) from a plant
fertilizes an egg on the same plant
24. The physical appearance of a trait
25. Offspring of the P generation parents,
have only one of the two parental traits
26. Sequence of DNA that codes for one trait
27. Type of cell used in fertilization
28. Structure in the cell where the linear
chromosomes are housed
30. An alteration in DNA
31. Half of a chromosome
32. The process that creates haploid daughter
cells
33. When neither allele of a gene is dominant
and can create a hybrid phenotype
1. The phase of mitosis where the sister
chromatids move to opposite poles
2. Protein structures on the centromere (where
spindle fibers attach)
3. The entire genetic makeup of an organism
5. Diploid stage of a moss and a fern
6. The scientific study of heredity
7. Pollination between flowers on two
different plants
8. Different forms of a gene
10. Female reproductive cells (eggs!)
11. Haploid reproductive sex cells, have only
one allele of each gene
12. Traits that are passed from parents to
offspring
14. Haploid stage of a moss and a fern
17. The longest phase of the cell cycle
20. All chromosomes that are not involved
with gender
22. Organism able to synthesize its own food
23. The specialized form of gametogenesis in
females
25. A matched pair of chromosomes
29. Chart used to determine the results of a
hybrid cross