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Genetics Test Review
Question | Answer |
---|---|
sex-linked gene | gene located on the X or Y chromosome |
Carrier | a person who has one recessive allele for a trait and one dominant allele |
pedigree | A chart or "family tree" that tracks which members of a family have a particular trait |
genetic disorder | An abnormal condition that a person inherits through genes or chromosomes |
mutation | A change in a gene or chromosome |
genetic engineering | genes from one organism are transferred into the DNA of another organism |
cloning | Making a genetically identical copy of an organism. |
hybridization | Breeding technique that involves crossing two genetically different individuals to bring together the best traits of both organisms |
inbreeding | A selective breeding method in which two individuals with identical or similar sets of alleles are crossed. |
selective breeding | The process of selecting a few organisms with desired traits to serve as parents of the next generation |
Gregor Mendel | Father of genetics |
dominant allele | An allele whose trait always shows up in the organism when the allele is present. |
recessive allele | An allele that is masked when a dominant allele is present |
Genotype | genetic makeup of an organism |
Phenotype | An organism's physical appearance, or visible traits. |
Homozygous | having two identical alleles for a trait |
Heterozygous | An organism that has two different alleles for a trait |
Purebred | An organism that always produces offspring with the same form of a trait as the parent. |
Hybrid | Offspring of crosses between parents with different traits |
Trait | physical characteristic of an organism |
Allele | Different forms of a gene |
gene | the factor that controls physical characteristics |
Heredity | Passing of traits from parents to offspring |
Adenine | Nitrogen base that pairs with Thymine in DNA |
Cytosine | Nitrogen base that pairs with Guanine in DNA |
DNA | Deoxyribonucleic Acid |
Guanine | Nitrogen base that pairs with Cytosine in DNA |
Double Helix | Spiral shape of DNA |
Thymine | Nitrogen base that pairs with Adenine in DNA |
Replication | Copying process by which a cell duplicates its DNA |
Uracil | Nitrogen base that pairs with adenine in RNA |
nucleus | Where DNA is located |
Ribosomes | site of protein synthesis |
Watson, Crick, and Franklin | Discovered DNA |
RNA | A single-stranded nucleic acid that passes along genetic messages |