genetics vocabulary quiz 2 · genetics vocabulary quiz 2 allele dominant allele recessive allele...
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GENETICS VOCABULARYQUIZ 2
Allele
Dominant Allele
Recessive Allele
Phenotype
Genotype
Heterozygous/Hybrid
Homozygous/Purbred
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Allele
Allele - one of two or more alternative forms of a gene that arise by mutation and are found at the same place on a chromosome.
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Dominant Allele
• DOMINANT ALLELE -an allele that produces the same phenotype whether its paired allele is identical or different
•A dominant allele is expressed even if it is paired with a recessive allele.
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Recessive ALLELE• RECESSIVE ALLELE- an allele that produces its characteristic phenotype only when its paired allele is identical
•A recessive allele is only visible when paired with another recessive allele.
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PHENOTYPE
• PHENOTYPE The set of observable characteristics of an individual – the physical characteristics.
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Heterozygous/Hybrid
• Heterozygous/Hybrid – a pair of alleles where one is dominant and one is recessive — they're different.
Which genotypes for fur color are Heterozygous?
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Homozygous/Purebred
• Homozygous/Purebred- a pair of matching alleles – two identical alleles of a .
Which alleles for fur color are Homozygous?
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Warm UP1. Draw and complete the Punnett
Square.
2. What are the parent genotypes?
3. Using the completed Punnett square,
what are the possible genotypes of
the offspring?
4. Using the completed Punnett square,
what are the possible phenotypes of
the offspring?
R r
r
r
R = Right Handedr = Left handed
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Warm UP
5. Using the completed Punnett square write the names of the allele combinations found in each square(Word Bank: Homozygous Dominant, Homozygous Recessive, Heterozygous) 1._____________2._____________3._____________4._____________
A a
1. 2.
a
a 3. 4.
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Probability
• Probability How likely something is to happen. If there is a 50/50 chance, then the probability is 50%.
PUNNETT SQUARE
• A square diagram that is used to predict the genotypes of a particular cross or breeding experiment.
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Sex Chromosomes
• Sex Chromosomes A chromosome involved in determining the sex of an organism, typically one of two kinds.