A A - Science 10 - Home

Name _ _ _ _ _ _ __ _ __ _____ Class _ _____ Date _ _ __

SECTION

1- 3

(pages 24-28)

Genetics and Probability

- - - - - - - - - KEY CONCEPTS - - - - - - - - A In addition to probability, a

A Probability can be used to

predict the results of genetic

crosses.

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special chart called a Punnett

square is used to show the

possible gene combinations in a

cross between two organisms.

Building Vocabulary Skills: Analyzing Information

A phenotype refers to _ _ _ _ _ _ _ _ _ __ _ _ _ _ _ _ _ __

A genotype is the _ _ _ _ _ _ _ _ _ __ _ _ _ _ _ _ _ _ _ __

Using the definitions you stated, answer the questions about the following

diagram.

p

F1

B

B

b

...,.....,..-~~''",,

X

BB

A

B

?l .::

l~ ~4, ~

B

et-''''

~

..., G>

~~_(~

~,,._

Bb

Bb

Bb

Bb

1\''?

,,,.._:;;;,,.... Ji.

bb

B

A

b

b

b

1. What are the phenotypes of the parents?

2. What are the genotypes of the parents? _ _ _ _ _ __ _ _ _ _ _ _ _ _ __

3. What are the phenotypes of the offspring? _ __ _ _ _ _ _ _ _ _ _ _ __

4. What are the genotypes of the offspring? _ _ _ _ _ _ _ _ _ _ _ _ _ _ __

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'I

F2

F1

B

b

1

ti'.

B

~.

BB

._a

f ~

Bb

X

;;-:---'"'"""''''''

;r'' ~"¡¤it

Bb

B

b

A

B

( :J

b

i

j

( 4'::J, r,i;.

,..._ '

b

Bb

4 ..

bb

1. What are the phenotypes of the parents? - -- - -- - -- - - -- - - - -- -

2. What are the genotypes of the parents? _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __

3. What are the phenotypes of the offspring? _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __

4. What are the genotypes of the offspring? _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __

5. How can you explain the fact that the offspring that has a BB genotype and one that has

a.Bb genotype are both black? _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __

6. Can a white offspring be a hybrid? Why? _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __

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Heredity: The Code of Life

Name _________________ Class ____ _ _ Date _ _ __

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Putting It Together: Applying the Main Ideas

Demonstrate your understanding of Punnett squares and

probability by completing the test cross in the Punnett square

and answering the questions.

p

8

b

b

X

Bb

A

B

bb

b

A

b

b

b

After completing the Punnett square show the relationship between the

Punnett square and probability by answering these questions.

1. What is the probability of getting a white offspring from this cross?

2. What is the probability of getting a black purebred offspring from this cross? Note: Read

this question carefully and think about it.

3. Can you explain your answer?

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Name _ __ _ _ _ _ _ _ __ _ _ _ _ _ Class _ _ _ _ _ _ Date _ _ __

REVIEW AND REINFORCEMENT GUIDE

CHAPTER 2 ? How Chromosomes Work

SECTION

2 -1

(pages 34-39)

The Chromosome Theory

- - - - - - - - KEY CONCEPTS - - - - - - - .._ According to the chromosome

theory, genes are carried from

parents to their offspring on

chromosomes.

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& The main function of

chromosomes is to control the

production of substances called

proteins.

Building Vocabulary Skills: Making Identifications

Examine the following diagram, then answer the following questions.

Male

Female

@

(fil)

i

i

Chromosomes double

@

?

/\

({j)

/\?

First cell division

@

?

I\ I\

Second cell division

_!J ~~ _tJ

I \ I\

?

@

~

I

I

4 Sperm

1 Egg

I

I

@

@

I

I

3 Polar bodies

1. Identify the process illustrated in the diagram. _ _ _ _ _ _ _ _ _ __ _ _ _ __

2. In your own words, describe this process.

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3. Identify the structures in the

diagram to the left.

Female

Male

4. In your own words, describe these structures.

5. What are the objects identified by letters? _ _ _ _ __ _ _ __ __ _ _ _ _ __

6. Explain the function of the objects identified by letters.

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Seeing Relationships: Using the Main Ideas

In your own words, write a complete statement relating each pair of words.

I. Genes, chromosomes

2. Chromosomes, proteins

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Heredity: The Code of Life

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