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Review Questions
Genetics
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Question 1An organism’s physical
appearance is known as its:
genotype
phenotype homozygous
heterozygous
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Question 2If a homozygous tall plant (TT) is crossed with
a homozygous short plant (tt). What is the probability that the offspring with be tall?
25%
50% 100%
75%
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Question 3What is a mutation?
Any change that is harmful to an organism
Any change that his helpful to an organism
Any change in the phenotype of a cell
Any change in a gene or chromosome
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Question 4
What are genes?
A type of cotton pants
The splitting of cells When both alleles are dominant.
The factors that control traits
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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.
Heterozygous means physical characteristics
and Homozygous means genetic makeup.
They mean the same thing.
Homozygous has 2 different alleles and
Heterozygous has 2 of the same alleles.
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Question 6
What is a segment of DNA on a chromosome?
phenotype
genes genotype
alleles
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Question 7
What is genotype?
The physical appearance of someone
A form of mutation A type of protein
An organisms genetic makeup
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Question 8
What is the different form of a gene?
Co-dominant
Mutation Allele
Meiosis
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Question 9
What is a phenotype?
When an organism has 2 of the same alleles.
An organism’s physical appearance or visible
traits.
When an organism has 2 different alleles.
An organism’s genetic makeup
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Question 10
What does the Chromosome Theory of Inheritance state?
Genes are carried from parents to offspring on
chromosomes.
Chromosomes are carried from parents to offspring
on hybrids
Hybrid pairs of chromosomes combine to
form offspring.
Co-dominant genes combine to form new
hybrids
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Question 11
What happens in Meiosis?
Chromosomes stay together to form new sex
cells.
Each sex cell loses half of its chromosomes
Each sex cell copies its DNA to form 4 identical
cells.
Chromosomes separate to form sex cells
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You have completed the review questions.