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35 Cards in this Set

  • Front
  • Back
the study of heredity
Genetics
The father of Genetics
Gregor Mendel
two different alleles for a trait
hybrid
physical characteristics
traits
the passing of traits from parents to offspring
heredity
a segment of DNA on a chromosome that codes for a specific trait
gene
an organsims that produces offspring with the same form of a trait as itself
purbred
how many alleles does a person inherit for a trait
2 (one from mom and one from dad)
always produces offspring that's genetically identical
asexual
produces offspring that is NOT genetically identical
sexual
Genes control and organisms__?
traits
An organisms physical appearance is referred to as __?
phenotype
what alleles would represent a tall heterozygous pea plant?
Tt
What alleles would represent a dominant homozygous pea plant?
TT
What allele would represent a recessive homozygous pea plant?
tt
Chromosomes carry ___ from parents to offspring
genes
How many alleles can you inherit from mom for a trait
one
What does the notation "Aa" mean in genetics?
Heterozygous
What does the notation "aa" mean in genetics?
Homozygous
the likelihood that an event will occur si called
probability
Why does a person who inherits an allele for brown eyes and an allele for blue eyes have brown eyes?
Brown eyes must have been dominant
Different forms of a gene are called?
Alleles
Offspring that are identical to the parents is a result of which type of reproduction?
Asexual
Bacterium use asexual reproduction. It will divide into two cells that are genetically____.
Identical
Where are chromosomes located?
In the nucleus of cells.
What is the TOTAL number of human chromosomes?
46 (23 from mom and 23 from dad)
Chromosomes consists of long chain molecules called?
DNA
____ letters are used to represent dominant alleles.
CAPITAL
____ letters are used to represent recessive alleles.
lower case
a chart used to predict that results of a genetic cross
punnett square
Genes are located on structures called
chromosomes
a trait that will ALWAYS show up in the organism when the allele is present
DOMINANT
a trait that is masked when the dominant allele is present.
recessive
Mendel used the principle of ______ to predict the percent of offspring that would show a particular trait.
Probability
when an allele is NEITHER dominant nor recessive and both alleles show up in the organisms this is called?
codominance