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In humans, females are normally determined by what chromosome arrangement?
XX
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How would you describe an organism that is Tt?
Heterozygous or hybrid
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Individuals with an extra chromosome result when chromosomes fail to separate during meiosis, this is called
non-disjunction
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If a trait is not evident in the parents and it shows up in the offspring, the trait must be
recessive
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When short pea plants (tt) are mated with tall pea plants (TT) only tall pea plants are produced. This illustrates the principal of
Dominance
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If an indiviual corn plant is Rr for a trait, how many different kinds of sperm can be produced for this trait only,
two
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What are the possible genotypes for an individual with Type A Blood?
AA or AO
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An individual with trisomy 21 has what disorder?
Down's syndrome
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A diagram that traces inheritance through several generations of a family is called a
pedigree chart
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If a cell has 44 chromosoems and it goes through meiosis, how mnay chromosomes will the resulting cells have?
22
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A student describes eye color as blue. Blue describes the organisms ___________________.
phenotype
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A student describes someone's eye color as BB. The students is describing the person's _________________
genotype
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Give an example of a sex-linked trait
Hemophilia, color blindness, muscular dystrophy
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How can you tell if a pedigree chart shows a sex-linked trait?
More boys have the disorder than girls
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How can you tell if a pedigree chart shows a recessive trait?
The trait skips generations
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Give an example of a 2n+1 mutation
- Trisomy 21 or
- XXY Kleinfelter's Syndrome
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Give an example of a 2n-1disorder.
XO Turner's syndrome
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What type of cells are made during meiosis?
sperm or egg
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How can you tell you are looking at a male in a pedigree chart?
It is a square
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In order to see the recessive trait, how many copies of the recessive allele must be present?
two
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