Review Questions Genetics.

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Presentation transcript:

Review Questions Genetics

Question 1 An organism’s physical appearance is known as its: genotype heterozygous phenotype homozygous

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Question 2 If a homozygous tall plant (TT) is crossed with a homozygous short plant (tt). What is the probability that the offspring with be tall? 25% 75% 50% 100%

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Question 3 What is a mutation? Any change that is harmful to an organism Any change in a gene or chromosome Any change that his helpful to an organism Any change in the phenotype of a cell

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Question 4 What are genes? A type of cotton pants The factors that control traits The splitting of cells When both alleles are dominant.

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Question 5 What is the difference between heterozygous and homozygous? Heterozygous has 2 different alleles and Homozygous has 2 of the same alleles. Homozygous has 2 different alleles and Heterozygous has 2 of the same alleles. Heterozygous means physical characteristics and Homozygous means genetic makeup. They mean the same thing.

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Question 6 What is a segment of DNA on a chromosome? phenotype alleles genes genotype

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Question 7 What is genotype? The physical appearance of someone An organisms genetic makeup A form of mutation A type of protein

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Question 8 What is the different form of a gene? Co-dominant Meiosis Mutation Allele

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Question 9 What is a phenotype? When an organism has 2 of the same alleles. An organism’s genetic makeup An organism’s physical appearance or visible traits. When an organism has 2 different alleles.

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Question 10 What does the Chromosome Theory of Inheritance state? Genes are carried from parents to offspring on chromosomes. Co-dominant genes combine to form new hybrids Chromosomes are carried from parents to offspring on hybrids Hybrid pairs of chromosomes combine to form offspring.

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Question 11 What happens in Meiosis? Chromosomes stay together to form new sex cells. Chromosomes separate to form sex cells Each sex cell loses half of its chromosomes Each sex cell copies its DNA to form 4 identical cells.

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You have completed the review questions.