Genetics and Heredity

3. an organism that receives 2 different alleles, like Tt
4. an organisms physical appearance or visible traits, like brown hair, blue eyes
7. different forms of a gene, or one gene from the pair
9. caused by a mutation or change in DNA like downs syndrome, cystic fibrosis, sickle cell
11. characteristics that are passed from parent to offspring some traits are dominant and some recessive.
12. the likelihood that a particular event will occur
13. a trait that does not show up unless the organism receives 2 recessive alleles, one from each parent, represented by lower case letters like t.
14. when the dominant allele is partially dominant- so colors blend
16. a tool used to predict the outcome of possible gene combinations that an offspring will have based on those of the parents.
17. a trait that will always be expressed in the physical appearance of the organism, respresented by a capital letter like T.
19. the factors that control traits, located on a chromosome, come in pairs

1. organism that has received 2 identical alleles, like TT or tt
2. located in the nuclues of the cell contains the DNA
4. a diagram of family relationships that can be used to trace traits that have been passed down or even genetic diseases
5. an organisms genetic makeup or allele combination like TT or Tt
6. the passing of traits from parents to offspring
8. the scientific study of heredity
10. located on the chromosomes in the nucleus of the cell, contains the genes
15. any change in the DNA that disrupts the normal cell cycle.
18. characteristics passed from parents to offspring