Lab 5 Flashcards
Gene
Factor of inheritance for a particular trait. Specific nucleotide sequence
Allele
Different forms of the same gene
Genotypes
genetic makeup of an organism
Phenotype
Physical appearance of an organism’s trait
Frequency
the proportion within a total population. expressed as a decimal (between 0 and 1)
Ratio
proportion of one thing to another. real numbers (X:X)
Mendel’s First Law
alleles of one gene segregate from one another during gamete formation.
Mendel’s Second Law
alleles of different genes assort independently of one another during gamete formation.
Uses for a test cross
- To find an unknown genotype
- To find if the genes are linked
Test Cross
Crossing an individual with a homozygous recessive individual
Recombinant Type Gametes
Combinations not present in the parental genotypes