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Quiz 5.1 Mendel's Genetics

True/False
Indicate whether the statement is true or false.
 

 1. 

One would find the gene for flower color in pea plants in the same exact location on the female’s chromosome as on the male’s chromosome.
 

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 2. 

What did Gregor Mendel do in his genetics experiments?
a.
He cross-pollinated pea plants by brushing pollen from one flower to another.
b.
He studied asexual plants.
c.
He cross-pollinated both plants and animals.
 

 3. 

Which term refers to physical characteristics that are studied in genetics?
a.
traits
b.
offspring
c.
generations
 

 4. 

Factors that control traits are called
a.
purebreds.
b.
parents.
c.
genes.
 

 5. 

The different forms of a gene are called
a.
alleles.
b.
masks.
c.
factors.
 

 6. 

When Mendel crossed a purebred tall pea plant with a purebred short pea plant, 
a.
one fourth of the offspring in the F1 generation were short
b.
all of the offspring in the F1 generation were tall.
c.
three fourths of the offspring in the F1 generation were tall
 

 7. 

Which of the following best expalins Mendel’s observations that traits in pea plants came in two forms.
a.
offspring are always hybrids
c.
chromosomes only hold 2 genes each
b.
because plants are the product of two different parents
 

 8. 

If an allele always shows up in an organism’s phenotype, it is said to be
a.
a mutation
c.
recessive
b.
dominant
 

 9. 

Scientists call an organism that has two different alleles for a trait a
a.
trait.
b.
purebred.
c.
hybrid.
 

 10. 

What does the notation AA mean to geneticists?
a.
two dominant alleles
b.
one dominant and one recessive allele
c.
heterozygous alleles
 

 11. 

What does the notation Aa mean to geneticists?
a.
one dominant allele and one recessive allele
b.
two dominant alleles
c.
homozygous alleles
 

 12. 

The phenotype of a pea plant that has the alleles TT is
a.
Tall
c.
medium
b.
short
 

 13. 

The phenotype of a pea plant with the alleles Tt is
a.
tall
c.
medium
b.
short
 

 14. 

The phenotype of a pea plant with the alleles tt is
a.
tall
c.
medium
b.
short
 

 15. 

The genotype of a homozygous tall pea plant is
a.
TT
c.
tt
b.
Tt
 

 16. 

The genotype of a heterozygous tall pea plant is
a.
TT
c.
tt
b.
Tt
 

 17. 

The difference between a purebred tall pea plant and a hybrid tall pea plant is
a.
hybrids are always shorter
c.
purebreds have two alleles that are the same and hybrids have two different alleles.
b.
purebreds are healthier
 

 18. 

Genes are found in
a.
cell cytoplasm
c.
chromosomes
b.
cell membranes
 

 19. 

A heterozygous blue creature is crossed with a homozygous orange creature. Which is dominant?
a.
Blue
c.
neither is dominant
b.
Orange
 

 20. 

Who gets credit for founding the science of genetics?
a.
the greeks
c.
Robert Hooke
b.
Gregor Mendel
 

 21. 

Parents produce cells that contain half the number of chromosomes because
a.
cells clone themselves
c.
body cells need only half the number of chromosomes
b.
a haploid sex cell from each parent combine to create a zygote
 



 
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