Genetics Flashcards
What is a gene?
-A sequence of bases on a DNA molecule that codes for a polypeptide
What is an allele?
-A form of a gene
What is a loci?
-The place at which a gene is fixed on a chromosome
What is a genotype?
-The different alleles that an organism has
What is a phenotype?
-The characteristics an organism has as a result of its genes and its environment
What is a dominant allele?
-Always expressed in the phenotype, even if there is only one dominant allele
What is a recessive allele?
-Characteristic only expressed in the phenotype if two recessive alleles are present
What does homozygous mean?
-Organism carries two copies of the same allele
What does heterozygous mean?
-Organism caries two different alleles for a gene
What is monohybrid inheritance?
-The inheritance of a characteristic controlled by a single gene
What is codominance?
-Two dominant alleles are expressed in the phenotype, the phenotype is an intermediate between the two alleles
What is always the null hypothesis during the chi-squared test?
-There is no significant difference between the observed and expected results
If the chi squared value is more than the critical value, what do you do to the null hypothesis?
-Reject the null hypothesis
If the chi squared value is less than the critical value, what do you do to the null hypothesis?
-Accept the null hypothesis
