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18 Cards in this Set
- Front
- Back
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Why did Gregor Mendell decide to study pea plants?
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have both male and female reproductive organs
Can self fertalize and cross pollonate Mendell can control over mating Easy to identify traits |
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Blending Model of Inheritance
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when mixing two different plants you will result in a new plant
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Particulate Model of inheritance
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Parents pass on discrete, heritable units that retain their separate identities in the offspring
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How do you create pure lines?
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made by self-feritlization
offspring always produce same trait as parents in self-fertilization |
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What does each characteristic inherit?
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an allele from each parent
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What happens if two alleles differ?
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The dominant one is expressed
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What will happen to the alleles in meiosis?
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They will segregate and end up in different gametes
Example: (sperm/egg) |
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What is it called when the alleles segregate in meiosis?
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The Law of Segregation
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What does genotype mean?
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the allele combination
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What does phenotype mean?
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the physical representation of the genes
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What are punnett squares used for?
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to predict the probability of a particular genotype and phenotype
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What is a monohybrid cross?
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A cross between two organisms that are heterozygous for a single trait
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What does heterozygous mean?
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when there is a dominant and recessive gene
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What does homozygous mean?
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when there is two dominant genes OR two recessive genes
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What is incomplete dominance?
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when there is no complete dominant allele
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What does codominance mean?
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When more than allele exists
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What is a multiple allele cross?
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genes that have more than two alleles but an organism can still only inherit two alleles for a particular trait
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What is a sex-linked trait?
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a trait linked to a sex chromosome
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