Genetics Lab Notes Flashcards
(27 cards)
What are units of information about specific traits called?
GENES
______________ is the location of a gene on a chromosome
LOCI/LOCUS
_____________ are similar chromosomes, one from each parent, with similar genes at the same locus
HOMOLOGOUS CHROMOSOMES
___________________ are different molecular forms of the same trait
ALLELES
Brown eyes/ Blue eyes are examples of what?
ALLELES
A ____________________ is an allele that can mask another allele
DOMINANT ALLELE
AA aa Aa…. The “A” is an example of what?
A DOMINANT ALLELE
What determines the outward expression when present?
THE DOMINANT ALLELE
A _____________________ is an allele that is masked by a dominate allele
RECESSIVE ALLELE
AA aa Aa…. The “a” is an example of what?
A RECESSIVE ALLELE
The ______________ must have two recessive alleles for a trait to show
RECESSIVE ALLELE
How many alleles does the recessive trait need for the give trait to show?
TWO
What is the term that is used when both alleles in a pair are the same?
HOMOZYGOUS
______________ is the specific gene pairs an individual carries
THE GENOTYPE
The _______________ can not be seen
GENOTYPE
What a phenotype?
AN INDIVIDUAL’S OBSERVABLE TRAITS
The ________________ can be seen
PHENOTYPE
How is the genotype expressed?
AA, Aa, aa
How is the phenotype expressed?
blue, brown, tall, dwarf
A _____________________ is a cross involving one gene pair for a single trait
MONHYBRID CROSS
What is a monohybrid cross?
A cross involving one gene pair for a single trait
What is a dihybrid cross?
A cross involving two gene pairs of two traits
A __________________ is a cross involving two gene pairs of two traits
DIHYBRID CROSS
A ___________________ is a device used to predict the possible genotypes and phenotypes of the offspring from a cross
PUNNET SQUARE
