SCIENCE

Genetics Review

Good Luck!

#1 #1 What do we call the passing of What do we call the passing of traits from parents to offspringtraits from parents to offspring??

Probability

Recessive

Heredity

#2 #2 Examples of alleles are Examples of alleles are _________?_________?

round and wrinkled for seed shape

Male and female

Blue eyes and brown hair

,,,

#3 #3 Chromosomes contain ____.Chromosomes contain ____.

anthers

many genes

proteins

#4#4 If you cross a Bb with a bb, what If you cross a Bb with a bb, what are the possible genotypes?are the possible genotypes?

(make a Punnett square)(make a Punnett square)

All BB

All bb

The Great Compromise

50% Bb and 50% bb

All Bb

#5 For the Punnett square you just did, #5 For the Punnett square you just did, what is the phenotype of the what is the phenotype of the

offspring?offspring?(If B = black and b = brown)(If B = black and b = brown)

All Black

1/2black,1/2 brown

All Brown

#6 #6 A normal human sex cell has A normal human sex cell has how many chromosomes ?how many chromosomes ?

The same number of chromosomes as every other cell

Twice the number of chromosomes as every other cell

Half the number of chromosomes as every other cell

#7#7 What does Heterozygous means? What does Heterozygous means?

Alleles are the Same

Alleles are Different

#8#8 Who is known as the Who is known as the ““Father of Father of GeneticsGenetics””??

Mendel

Punnett

Newton

“FATHER OF GENETICS”

#9#9 What name is given to the set of What name is given to the set of instructions for a characteristic?instructions for a characteristic?

Gene

DNA

Chromosome

#10#10 Homozygous means? Homozygous means?

Alleles are the Same

Alleles are Different

#11#11 Meiosis results in the production of Meiosis results in the production of ______________??

Sex cells

Cells with the half the number of chromosomes

All of the above

12. 12. What symbol is used to What symbol is used to

represent males in a pedigreerepresent males in a pedigree??

circle

diamond square

13. In the pedigree above, how do 13. In the pedigree above, how do

you know who has the traityou know who has the trait??

They are filled in

They are all male

They are all female

14. 14. In the pedigree above, how In the pedigree above, how many siblings does individual 1 many siblings does individual 1 have?have?

5

2 4

1

#15#15 All of an individual’s alleles are All of an individual’s alleles are known as their _________known as their _________??

Pedigree

Phenotype

Genotype

#16#16 What are chromosomes?What are chromosomes?

The same thing as Alleles

Organized structures of DNA

#17#17 How many sets of instructions does an How many sets of instructions does an individual have for each traitindividual have for each trait??

3

1

2

#18#18

a) Complete this punnett square.a) Complete this punnett square.Which of the following best Which of the following best describes your results?describes your results?

3 purple:1 white

2 purple:2 white

1 purple:3 white

4 purple:0white