Mendelian Genetics Flashcards
Mendel
Studied garden peas and found out that a trait of one parent is passed on to offspring and not the trait of other parent
Allele
Alternative state of a gene
Dominant
One allele is showed over the other allele (recessive)
Heterozygous
One dominant and one recessive allele
Homozygous
Two dominant or two recessive alleles
Genotype
All genes contained in their diploid cells
Phenotype
Manifestation of expressed genes
How to predict phenotype
Must know genotype of parents and which genes are dominant
Locus
Specific place alleles are located on each chromosome
P, F1 and F2
Parents, offspring
Punnett Square
Device used to figure out offspring
Incomplete Dominance
Phenotype of offspring differs from both parents, white + red = pink
Gene Interaction
Occurs when 2 or more genes determine a single phenotypic trait, IQ
Nonallelic modifier genes
When one allele’s phenotype is affected by a gene from another locus
Pleiotropy
When a single gene can cause a number of different phenotypes