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ch.5 study
what term refers to physical characteristics that are studied in genetics?
traits
factors that control a trait are called
genes
what is an organism with 2 different alleles called
hybrid or heterozygous
an organism with 2 of the same alleles is called
a purebred or a homozygous
AA means
2 dominant alleles
Aa means
1 dominant and 1 resscessive alleles
what are different forms of a gene called
alleles
what is probability
to predict the results of a particular event
what does a Punnett Square show
all the possible allele combinations
what is a phetotype
the physical appearance of an organism
what is a genotype
the genetic makeup of an organism
what is a homozygous
an organism with the same alleles
what is codominance
when alleles are neither recessive or dominant
what is the chromosome theory of inheritance
that a offspring get one gene from each parent
what is meiosis
when the number of chromosomes are divided in half to form sex cells
what is a mutation
a change in a gene or chromosome
when is a mutation harmful
when it affects the reproduction or heart systems