Glencoe Science Level Red

Chapter 20: The Role of Genes in Inheritance

The Role of Genes in Inheritance

1
How many chromosomes does a human body cell have?
A)23
B)43
C)63
D)46
2
The sequence of bases in a DNA molecule is similar to a(n) __________.
A)code of instructions
B)communication network
C)unknown puzzle
D)set of tools
3
What process was used in 1997 to produce a sheep named Dolly?
A)cloning
B)sexual reproduction
C)budding
D)regeneration
4
How can the DNA from two human parents combine?
A)fertilization
B)mitosis
C)meiosis
D)cloning
5
The division of a cell's nucleus into two identical nuclei is called __________.
A)sexual reproduction
B)meiosis
C)mitosis
D)fertilization
6
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)a hybrid
B)dominant
C)pure
D)recessive
7
Blood type in humans is an example of __________ controlling a trait.
A)one allele
B)mutations
C)multiple genes
D)multiple alleles
8
Sperm and egg each contain __________.
A)23 alleles for each trait
B)one allele for each trait
C)only dominant alleles
D)two alleles for each trait
9
In many plants, __________ are produced following fertilization.
A)seeds
B)flowers
C)eggs
D)petals
10
What type of cells are formed by meiosis?
A)body cells
B)skin cells
C)sex cells
D)liver cells
11
The study of which traits are passed from parent to offspring is called __________.
A)sexual reproduction
B)cloning
C)genetics
D)heredity
12
Changes in genes or chromosomes are called __________.
A)multiple alleles
B)alleles
C)heredity
D)mutations
13
Whether a goldfish inherits a large or small tail depends upon which genes are carried in __________.
A)its parents' body cells
B)its parents' tail cells
C)its own sex cells
D)its parents' sex cells
14
Shoots growing from the eye of a potato are a form of __________.
A)fertilization
B)sexual reproduction
C)asexual reproduction
D)budding
15
If a rabbit with one brown-fur allele and one white-fur allele has brown fur, which allele would you suspect was dominant?
A)both alleles
B)the white-fur allele
C)neither allele
D)the brown-fur allele
16
What is a small section of DNA that has information about a trait called?
A)a chromosome
B)a molecule
C)a sex cell
D)a gene
17
Why is selective breeding used with dairy cattle, race horses, and many other animals?
A)to produce mutations
B)to continue desired traits
C)to increase variations
D)to reduce sexual reproduction
18
Which one of the following is an example of heredity?
A)Honeybees collect nectar from flowers.
B)Two students in a class have red hair.
C)A kitten has black fur like its mother.
D)A bird builds a nest of grass and mud.
19
Because of __________ a human baby probably does not look exactly like either of its parents.
A)asexual reproduction
B)cloning
C)budding
D)sexual reproduction
20
How many copies of a gene must an individual have to show a recessive trait?
A)three
B)two
C)one
D)four
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