1. cell mutations occur in reproductive cells.
2. mutations are caused by missing whole sections of chromosomes.
3. mutations are caused by sections of genes that are on the wrong chromosome
4. mutations are caused by sections of the chromosome that are upside down
5. is dominant over white eyes in fruit flies.
6. discovered sex chromosomes.
7. mutations - involve changes in many genes usually due to breaks in chromosomes:
8. Any change in a gene is called a .
9. A change in a single gene is called a mutation.
10. All chromososmes other than the sex chromosomes are called .
11. Any substance that can cause mutations in cells would be called a/an .
12. first hypothesized that chromosomes were responsible for heredity.
13. Black fur and yellow fur are sex-linked and co-dominant in cats. This produces cats.
14. Chromosome mapping is done by determining the at which genes cross over and estimating how far apart they are.
15. Fruit flies have only pairs of chromosomes.
16. In , the ends of two identical sister chromatids break off and swap places as they are re-attached.
17. Morgan showed that certain genes are always found on the chromosomes.
18. Mutations are usually caused by mistakes in the DNA code, by mutagenic substances, or environmental factors.
19. Mutations in body cells are called mutations.
20. Normal blood clotting is dominant over .
21. Other sex-linked traits include color blindness and (free-bleeders).
22. Point mutations may be due to base substitution, base , or base addition.
23. Rh-induced problems in pregnancy occur when the mother is and a second child is .
24. Sex-linked recessive traits show up much more often in .
25. Sex-linked traits are usually caused by genes found only on the chromosome.
26. Some mutations are called " mutations" because they result in death.
27. The sex chromosomes in are called X and Y.
28. The sex chromosomes in are called X and X.
29. The term "gene" was first used to describe these tiny particles of inheritance in 1909, by
.
30. first observed chromosomes during mitosis.