North Carolina Science Grade 7

Chapter 5: Heredity

Heredity

1.
__________ is the process Mendel used to pollinate flowers of short plants with pollen from tall plants.
A)Cross-pollination
B)Genetics
C)Polygenic inheritance
D)Mitosis
2.
Mendel's pea plants were __________ for the tall-dominant trait.
A)homozygous
B)heterozygous
C)pedigrees
D)variable
3.
Which process separates chromosomes?
A)inheritance
B)meiosis
C)pedigree
D)chemosynthesis
4.
Which of these is used to improve the phenotype of plants?
A)recombinant DNA
B)mitosis
C)chromosome disorders
D)selective breeding
5.
Which is true of mutations in DNA?
A)Mutations have no effect on an organism.
B)All mutations are harmful to an organism.
C)A mutation might have no effect on an organism.
D)All mutations are beneficial to an organism.
6.
Which of these describe the allele that causes color blindness?
A)carried on the X chromosome
B)present only in males
C)carried on the Y chromosome
D)dominant
7.
Where are the alleles for each parent written when using a Punnett square?
A)in the bottom two squares of the grid
B)in the top two squares of the grid
C)across the top and along the side of the grid
D)only at the bottom of the grid
8.
Which topic in mathematics did Mendel use to help explain heredity?
A)algebra
B)calculus
C)probability
D)geometry
9.
Which of these is usually the cause of human genetic disorders?
A)recessive genes
B)genetic engineering
C)incomplete dominance
D)mucus
10.
What influences whether the gene for brightly colored feathers is expressed in a bird?
A)incomplete dominance
B)external influences
C)chromosome disorders
D)internal influences
11.
Which of these separates during meiosis?
A)proteins
B)alleles
C)pedigrees
D)phenotypes
12.
A person with phenotype O blood has how many possible genotypes?
A)2
B)6
C)3
D)1
13.
Which of these is an organism that produces the same traits in every generation?
A)a purebred
B)a pea plant
C)a hybrid
D)a chromosome
14.
A person with phenotype A blood has how many possible genotypes?
A)3
B)1
C)2
D)6
15.
___________ studies how traits are inherited through the interactions of alleles.
A)Mitosis
B)Genetics
C)Probability
D)Regeneration
16.
Which of these describes how an organism looks?
A)its zygosity
B)its probability
C)its phenotype
D)its hybrid
17.
Which pair of chromosome produces a female offspring?
A)a female Y chromosome and a male X chromosome.
B)a female X chromosome and a male Y chromosome.
C)a female X chromosome and a male X chromosome.
D)a female Y chromosome and a male Y chromosome.
18.
Which is a tool that is used to predict genetic crosses?
A)a tally sheet
B)a Venn diagram
C)a Punnett square
D)a slide rule
19.
__________ is the production of a phenotype that is between two homozygous parents.
A)Genetic engineering
B)Incomplete dominance
C)A sex-linked gene
D)A hybrid
20.
Blood types in humans are an example of traits controlled by __________.
A)offspring
B)only homozygous parents
C)pedigree
D)multiple alleles
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