Download Level Guide Chapter 9

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Level I Guide: Chapter 9
Level I Directions: Read each statement carefully. Using your textbook, decide if the statement is true or
false. Determine if the statement is true or false and place that in the first blank and the page number in
the second blank. Correct all statements that are false so that you have statements so that you have true
statements to help you study for your test.
True
False
Page
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A trait is a characteristic that an organism can pass on
to its offspring.
A set of traits that is passed on from parents to offspring
Is called heredity.
Mendel saw that traits that appeared in the parent
generation did not show up in the first generation, but
did show up in the second generation.
Mendel chose pea plants for his experiment because they were his
favorite vegetable.
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A phenotype is the form of the trait that we see.
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The genotype of an organism shows the genes if contains.
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A lowercase letter represents the dominant allele and an uppercase
letter represents the recessive allele.
Individual units called genes determine an organism’s traits.
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A gene is a piece of DNA on the chromosomes that carries
hereditary information.
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A punnett square can be used to predict the genotypes and
phenotypes of offspring.
When true-breeding plants self-pollinate they produce offspring
with the same form of the trait as the parent plant.
Mendel used cross-pollination to find out what would happen if he
crossed two plants with different forms of a trait.
When Mendel used ratios to compare the number of white flowers
to the number of purple flowers produced in the second
generation, he found that the ratio of purple flowers to every white
flower was 4:1.
Mendel found that for every trait of a gene there must be two
forms of the same gene called alleles.
A recessive allele covers up the appearance of the dominant allele
when it is present.
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Probability is the chance that an event will occur.
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A female has two X chromosomes in her body cells, while a male
has two Y chromosomes in his body cells
The chances of having a boy or a girl are 50:50.
Level II Directions: Using your prior knowledge and what you have learned from this section, to
complete the assignment below.
You are Gregor Mendel! Write a short letter explaining your work with pea plants to a friend or
colleague. BE SURE TO INCLUDE how you actually carry out your experiments as well as
what you have discovered through your work.