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Genetics
This study stack includes terminology for Mendelian Genetics.
| Question | Answer |
|---|---|
| homozygous | 2 of the same allele (AA, aa) |
| Heterozygous | 2 different alleles (Aa) |
| Dominant | this allele shows up (A) |
| Recessive | this allele can be hidden (a) |
| Genotype | the genetic make up (Aa, aa, AA) |
| Phenotype | physical appearance (i.e. hair color) |
| traits | Characteristics that are inherited |
| alleles | Different forms of a gene |
| Punnett square | A diagram for predicting the allele composition of offspring from a cross between individuals of known genetic makeup. |
| Incomplete dominance | A pattern of inheritance in which two alleles, inherited from the parents, are neither dominant nor recessive. The resulting offspring have a phenotype that is a blending of the parental traits. |
| Codominance | A condition in which both alleles for a gene are fully expressed |
| Multiple alleles | A gene that has more than two alleles |
| mutation | a change in a DNA sequence |
| silent mutation | point mutation that does not change the resulting protein (change in a base, but no change in protein function) |
| missense mutation | point mutation that changes one amino acid in the resulting protein |
| nonsense mutation | point mutation that inserts a stop codon and shortens the resulting protein |
| frame-shift mutation | changes how bases are grouped into codons, or the reading frame of the gene |
| chromosomal deletion | chromosomal mutation that removes a large segment of genetic material |
| chromosomal duplication | mutation that causes genes to be repeated on the same chromosome |
| chromosomal inversion | mutation that flips the order of genes on a chromosome |