Genetics review. In a Punnett square problem, what do the capital letters represent?
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Transcript of Genetics review. In a Punnett square problem, what do the capital letters represent?
![Page 1: Genetics review. In a Punnett square problem, what do the capital letters represent?](https://reader036.fdocuments.in/reader036/viewer/2022062423/5697bfd41a28abf838cacb97/html5/thumbnails/1.jpg)
Genetics review
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In a Punnett square problem, what do the capital letters represent?
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• dominance
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How do dominant traits show up?
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• When at least one allele is present (one capital letter)
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How do recessive traits show up?
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• When there are two lower case letters representing the alleles
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What is the purpose of the Punnett square?
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• To show all the possibilities of alleles
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What is genotype?
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• What an individual’s genes look like.
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What is phenotype?
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• What an individual physically looks like according to their traits.
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Who is the father of genetics?
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• Gregor Mendel
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What is heredity?
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• The passing on of traits from one generation to another
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What is the Law of Independent Assortment?
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• Allele pairs separate independently during the formation of gametes. This means that traits are transmitted to offspring independently of one another.
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What are homologous chromosomes?
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• Two sister chromatids are attached in the middle. They are in pairs.
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What are the chances a baby will be born a boy?
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• 50%• 2:2
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What is crossing over?
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• When pieces of chromosomes break off and reattach to another chromosome during meiosis.
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What are alleles?
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• They represent the genes on a chromosome
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What is the law of segregation?
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• The principle stating that during the production of gametes the two copies of each hereditary factor segregate so that offspring acquire one factor from each parent.
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What is a Bb individual?
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• Hybrid or heterozygous
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What is a BB individual?
• Purebred or homozygous
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Crossing a red flower with a white one produces pink, this is an example of?
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• Incomplete dominance
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What is the purpose of a pedigree?
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• To track a trait through the generations of a family tree.
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Crossing a white and black chicken produces a checkered one, this is an example of?
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• Co-dominance
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What is hemophilia?
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• A sex-linked inherited bleeding disease.
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