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