genetics review
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What is heredity? | the passing of physical characteristics from parent to offspring
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| What are genetics? | the scientific study of heredity
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| What are traits? | each differentform of a characteristic, such as stem hight or seed color
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| Who was Mendel? | a scientist who studied genetics and how traits were iherited in pea plants
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| What organisms did Mendel study? | pea plants
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| what is a gene? | a factor that controls a trait
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| where do offspring inherit their genes for a particular trait from | from their 2 parents
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| what is an allele | different forms of a gene
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| what is a dominant allele | one whose trait always shows up when the allele is present
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| what is a recessive allele | one that is hidden whenever the dominant allele is present
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| 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
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| what is a purebred organism | the offspring of many generations that have the same traits
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| what is a hybrid organism | has two different alleles for a trait
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| what is a genotype | an organism's genetic makeup or allele combinations
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| what does a genotype of TT mean | that the trait is dominant
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| what doet the genotype tt mean | that the trait is recessive
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| what does the genotype Tt mean | that the trait is dominant
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| what is a phenotype | organisms physical apperance or visable traits
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| what allele will a hybrid organism show | the dominant allele
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| what is a homozygous genotype | an organism that has two identical alleles for a trait
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| what are the two possible letter combinations for a homozygous genotype | BB and bb
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| what is a heterozygous genotype | an organism that has 2 different alleles for a trait
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| what will the letters look like in a heterozygous genotype | Bb
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| what does probability predict in genetics | probability predicts the traits that are likely to occur as a result of genetic crosses
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| what predicts the results of a particular event | probability
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| 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
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| punnett square | a chart that shows all the possible combinations of allelles that can result from a genetic cross
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| 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
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| how do you represent a recessive allele? | with a lower case letter
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| how do you represent a dominant allele? | With a capital or upper case letter
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| what organism did Sutton study? | sex cells in grasshoppers
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| What is the chromosome theory of inheritance? | genes are carried from parents to their offspring on chromosomes
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| where does an offspring get each chromosome in a chromosome pair? | one from the male and one from the female
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| what does DNA make up? | DNA makes up chromosomes
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| where does an offspring get each of its alleles for a specific trait? | one from the male parent and one from the female parent
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| Where are genes found? | on chromosomes
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Created by:
KrystalMac
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