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science final 7

genetics review

What is heredity? the passing of physical characteristics from parent to offspring
What are genetics? the scientific study of heredity
What are traits? each differentform of a characteristic, such as stem hight or seed color
Who was Mendel? a scientist who studied genetics and how traits were iherited in pea plants
What organisms did Mendel study? pea plants
what is a gene? a factor that controls a trait
where do offspring inherit their genes for a particular trait from from their 2 parents
what is an allele different forms of a gene
what is a dominant allele one whose trait always shows up when the allele is present
what is a recessive allele one that is hidden whenever the dominant allele is present
what is codominance a condition in which neither of two alleles of a gene is dominent or recessive so both alleles are expressed in the offspring
what is a purebred organism the offspring of many generations that have the same traits
what is a hybrid organism has two different alleles for a trait
what is a genotype an organism's genetic makeup or allele combinations
what does a genotype of TT mean that the trait is dominant
what doet the genotype tt mean that the trait is recessive
what does the genotype Tt mean that the trait is dominant
what is a phenotype organisms physical apperance or visable traits
what allele will a hybrid organism show the dominant allele
what is a homozygous genotype an organism that has two identical alleles for a trait
what are the two possible letter combinations for a homozygous genotype BB and bb
what is a heterozygous genotype an organism that has 2 different alleles for a trait
what will the letters look like in a heterozygous genotype Bb
what does probability predict in genetics probability predicts the traits that are likely to occur as a result of genetic crosses
what predicts the results of a particular event probability
what 2 things does a punnett square tell you about the offspring? 1) all of the possible outcomes of a genetic cross 2)Determines the probability of a particular outcome
punnett square a chart that shows all the possible combinations of allelles that can result from a genetic cross
if a homozygous tall parent crosses with a homozygous short parent, what is the prbability that the offspring will be tall? 4 out of 4 times
how do you represent a recessive allele? with a lower case letter
how do you represent a dominant allele? With a capital or upper case letter
what organism did Sutton study? sex cells in grasshoppers
What is the chromosome theory of inheritance? genes are carried from parents to their offspring on chromosomes
where does an offspring get each chromosome in a chromosome pair? one from the male and one from the female
what does DNA make up? DNA makes up chromosomes
where does an offspring get each of its alleles for a specific trait? one from the male parent and one from the female parent
Where are genes found? on chromosomes
Created by: KrystalMac