Focus On Life Science: California Grade 7

Chapter 4: Genetics

Standard Assessment

1.
A person with phenotype O blood has how many possible genotypes? 2.d
A)3
B)1
C)2
D)6
2.
A person with phenotype A blood has how many possible genotypes? 2.d
A)6
B)1
C)2
D)3
3.
Which pair of chromosomes produces a female offspring? 2.c
A)a female X chromosome and a male Y chromosome.
B)a female X chromosome and a male X chromosome.
C)a female Y chromosome and a male Y chromosome.
D)a female Y chromosome and a male X chromosome.
4.
Which pair of chromosome produces a male offspring? 2.c
A)a female X chromosome and a male Y chromosome.
B)a female Y chromosome and a male X chromosome.
C)a female Y chromosome and a male Y chromosome.
D)a female X chromosome and a male X chromosome.
5.
Which of these is an organism that produces the same traits in every generation? 2.d
A)a chromosome
B)a hybrid
C)a pea plant
D)a purebred
6.
Which is a tool that is used to predict genetic crosses? 7.a
A)a Venn diagram
B)a slide rule
C)a Punnett square
D)a tally sheet
7.
Which topic in mathematics did Mendel use to help explain heredity? 2.d
A)algebra
B)probability
C)calculus
D)geometry
8.
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 __________. 2.d
A)dominant
B)recessive
C)a hybrid
D)pure
9.
__________ is the production of a phenotype that is between two homozygous parents. 2.d
A)Genetic engineering
B)A hybrid
C)Incomplete dominance
D)A sex-linked gene
10.
Which of these is usually the cause of human genetic disorders? 2.d
A)incomplete dominance
B)mucus
C)genetic engineering
D)recessive genes
11.
__________ is the process Mendel used to pollinate flowers of short plants with pollen from tall plants. 2.d
A)Cross-pollination
B)Mitosis
C)Genetics
D)Polygenic inheritance
12.
Where are the alleles for each parent written when using a Punnett square? 7.a
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
13.
Which process separates chromosomes? 2.b
A)pedigree
B)meiosis
C)inheritance
D)chemosynthesis
14.
Which of these describes how an organism looks? 2.d
A)its probability
B)its phenotype
C)its hybrid
D)its zygosity
15.
If a rabbit with one brown-fur allele and one white-fur allele has brown fur, which allele would you suspect was dominant? 2.d
A)neither allele
B)both alleles
C)the brown-fur allele
D)the white-fur allele
16.
Blood types in humans are an example of traits controlled by __________. 2.d
A)only homozygous parents
B)offspring
C)multiple alleles
D)pedigree
17.
__________ studies how traits are inherited though the interactions of alleles. 2.d
A)Regeneration
B)Mitosis
C)Probability
D)Genetics
18.
Which of these is a trait that is produced by a combination of multiple genes? 2.d
A)polygenic inheritance
B)DNA
C)recessive alleles
D)incomplete dominance
19.
Which of these is the result of an extra chromosome? 2.d
A)smallpox
B)Color blindness
C)Down's syndrome
D)influenza
20.
How many copies of a gene must an individual have to show a recessive trait? 2.d
A)one
B)two
C)three
D)four
Grade 7
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