Florida Science Grade 6

Chapter 3: The Role of Genes in Inheritance

The Role of Genes in Inheritance

1.
Which one of the following is an example of regeneration?
A)A human baby is born.
B)A new individual hydra grows from a hydra.
C)A chameleon grows a new tail.
D)Sperm and egg are produced.
2.
How many copies of a gene must an individual have to show a recessive trait?
A)one
B)four
C)two
D)three
3.
Changes in genes or chromosomes are called __________.
A)mutations
B)multiple alleles
C)alleles
D)heredity
4.
Because of __________ a human baby probably does not look exactly like either of its parents.
A)budding
B)cloning
C)asexual reproduction
D)sexual reproduction
5.
How many chromosomes does a human body cell have?
A)63
B)43
C)46
D)23
6.
If a rabbit with one brown-fur allele and one white-fur allele has brown fur, which allele would you suspect was dominant?
A)the brown-fur allele
B)the white-fur allele
C)neither allele
D)both alleles
7.
What is a small section of DNA that has information about a trait called?
A)a gene
B)a chromosome
C)a molecule
D)a sex cell
8.
Sperm and egg each contain __________.
A)only dominant alleles
B)one allele for each trait
C)23 alleles for each trait
D)two alleles for each trait
9.
In a corn plant, a pair of chromosomes is found to have one allele for purple seeds and one for yellow seeds. The trait of seed color in this plant would be called __________.
A)pure
B)dominant
C)a hybrid
D)recessive
10.
The sequence of bases in a DNA molecule is similar to a(n) __________.
A)code of instructions
B)set of tools
C)communication network
D)unknown puzzle
11.
Why might a cell use mitosis to divide?
A)to produce sperm
B)to replace aging or injured cells
C)so fertilization can take place
D)to produce sex cells
12.
Shoots growing from the eye of a potato are a form of __________.
A)asexual reproduction
B)fertilization
C)sexual reproduction
D)budding
13.
Which sperm will fertilize the egg during sexual reproduction?
A)the sperm that has hybrid traits
B)the sperm that has extra chromosomes
C)the sperm with the most dominant alleles
D)It is a matter of chance.
14.
How can the DNA from two human parents combine?
A)fertilization
B)meiosis
C)mitosis
D)cloning
15.
The shape of DNA is like a __________.
A)folded umbrella
B)twisted ladder
C)flight of stairs
D)triangle
16.
What process was used in 1997 to produce a sheep named Dolly?
A)sexual reproduction
B)regeneration
C)cloning
D)budding
17.
The study of which traits are passed from parent to offspring is called __________.
A)cloning
B)heredity
C)sexual reproduction
D)genetics
18.
What is hereditary material made of?
A)cells
B)sperm
C)DNA
D)eggs
19.
What type of cells are formed by meiosis?
A)sex cells
B)liver cells
C)skin cells
D)body cells
20.
The division of a cell's nucleus into two identical nuclei is called __________.
A)fertilization
B)mitosis
C)sexual reproduction
D)meiosis
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