Genetics Vocabulary - Unit 7
Terms in this set (29)
-change in one base, such as a substitution, that doesn't affect other bases
letters representing a trait, ex: Tt
a characteristic describing a person, which can be passed from parent to offspring.
one dominant and one recessive alleles; hybrid. Ex: Tt
two dominant or two recessive alleles; pure. Ex: TT or tt
physical trait that is seen, ex: tall or short
the two forms of a gene
traits that are controlled by two or more genes, ex: skin color.
allele that is weaker and hidden, represented by a lowercase letter
allele that is stronger and is expressed, represented by a capital letter.
punnett square involving a single trait
more than two alleles exist, even though only two are inherited, ex: blood type.
trait located on the sex chromosomes (X and Y).
trait that is not located on the sex chromosomes.
punnett square involving two traits
alleles for different traits are distributed to sex cells independently of one another, which produces unique allele combinations.
-a visual representation of all the chromosomes in a cell
-chart of the genetic history of a family over generations.
-a change or error in the bases of DNA
Somatic Cell Mutation
-an error in the DNA of a body cell, which will not be passed onto offspring
-something that causes a mutation
Gamete Cell Mutation
-an error in the DNA Of a sex cell, which will be passed onto offspring
-mutation that affects one single gene.
-mutation that affects a group of genes or an entire chromosome.
-a problem in the genome of an organism that produces abnormalities and specific symptoms,inherited from parents
-chromosomes fail to separate during anaphase II of meiosis.
-form of dominance where the alleles of a gene pair in a heterozygote are both expressed. This results in offspring with a phenotype that is neither dominant nor recessive. Ex: blood type
-change in one or more bases that causes all subsequent bases to shift over and therefore to
-a heterozygous condition in which both alleles in a gene are partially expressed andwhich often produces an intermediate phenotype. Ex: Allele for red and allele for white