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STAAR #2
STAAR Reporting Category #2
Question | Answer |
---|---|
Nucleotide | A subunit (monomer) of nucleic acids like DNA and RNA. Composed of a sugar, phosphate, and nitrogenous base. |
Phosphate Group | Component of DNA or RNA nucleotide |
Deoxyribose | A monosaccharide (sugar) found in each nucleotide in DNA. |
Nitrogen Bases | Adenine, Thymine, Cytosine, and Guanine in DNA. Adenine, Uracil, Cytosine, and Guanine in RNA. |
Genetic Code | The code found in DNA that matches codons in mRNA to amino acids on tRNA. |
Genome | An organism's complete set of genetic information (DNA). |
Transcription | The process where a copy of mRNA is made from one gene in DNA; occurs in nucleus |
Translation | The process of making a protein, where tRNA matches amino acids to codons in the mRNA; occurs in ribosome |
Translocation | mutation resulting from movement of DNA from one chromosome to a different location on some chromosome |
Meiosis | cell division creating sex cells with half the amount of DNA |
Monohybrid cross | punnett square showing results of genetic cross of one trait |
Dominant | allele with genetic trait always expressed |
homozygous | alleles with the same genetic information |
Non-Mendelian Inheritance | genetic inheritance pattern different from dominant hides recessive trait such as codominance, imcomplete dominance |
Incomplete Dominance | genetic inheritance pattern where phenotype of offspring are a blend between two separate parental phenotypes |
Genetic Mutation | changes in organism's DNA sequence; |
Deletion | changes in genetic code with removal of nucleotides |
Insertion | changes in genetic code with addition of nucleotides |
Inversion | changes in genetic code with nucleotides in opposite order |
Gene | A unit of heredity; A portion of DNA that codes for a trait. |
Punnett Square | graphic organizer showing results of a genetic cross |
Dihybrid cross | punnett square showing results of genetic cross of two traits |
Mendelian Inheritance | genetic inheritance pattern when dominant trait always masks or hides phenotype of recessice trait |
Recessive | Genetic trait which only expresses phenotype when in homozygous state; hides when dominant allel is present |
Homozygous | alleles with the same genetic information |
Heterozygous | alleles with different genetic information; one dominant allele and one recessice allele. |
Co-dominance | genetic inheritance pattern in which two dominant alleles are expressed in phenotype |
DNA fingerprinting | creating a gel electrophoresis of DNA nucleotides to determine similarities in banding patterns |
Genetic Modification | changing of the DNA sequence to alter protein synthesis |
Chromosomal Analysis | karyotype; picture of chromosomes to determine mutations such as nondisjunction |
Sex Cells | Haploid cells created by meiosis; gametes |
Independent Assortment | Mendel principle states different pairs of genes are passed to offsrping separately to form new gene combinations |
Crossing Over | exchange of DNA from separate chromosomes during meiosis |
Segregation | Mendel principle that gene pairs separate during meiosis so each parent passes down one form of gene to offspring. |