Download allele - K12 Open Ed

allele
• a different form of a gene
chromosome
• a microscopic structure in the body that
contains DNA and is shaped like a
thread
Credit: Steffen Dietzel
dominant
• stronger; more powerful; a genetic trait
that takes over
egg
• reproductive cells provided by a female,
which can join with sperm to form a new
offspring
gene
• a unit of heredity, such as a stretch of
DNA, that determines traits; a sequence
of nucleotides in DNA or RNA that
determines traits, such as eye color
genotype
• the genetic makeup of an organism
homozygous
• an organism with two of the same
alleles for a trait (TT or tt)
heterozygous
• an organism with two different alleles for
a trait (Tt)
pedigree
• a chart that shows the inherited traits
over several generations
phenotype
• the physical traits of an organism
Punnett Square
• a chart that shows all the possible
combinations of alleles on a grid or
cross
Credit: Pbroks13
recessive
• weaker; likely to be overridden by
something dominant or stronger; a
genetic trait that is shown only if the
dominant one is not there
sperm
• reproductive cells provided by the male,
which can join with an egg to form a
new offspring
trait
• a characteristic that can be inherited; a
feature of something, like having blue
eyes