Focus On Life Science: California Grade 7

Lesson 2: Understanding Inheritance

Standards Check

1.
Which of these is the result of an extra chromosome? 2.d
A)Color blindness
B)Down's syndrome
C)smallpox
D)influenza
2.
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
3.
Where are the alleles for each parent written when using a Punnett square? 7.a
A)across the top and along the side of the grid
B)in the top two squares of the grid
C)in the bottom two squares of the grid
D)only at the bottom of the grid
4.
__________ is the production of a phenotype that is between two homozygous parents. 2.d
A)A sex-linked gene
B)A hybrid
C)Genetic engineering
D)Incomplete dominance
5.
A person with phenotype O blood has how many possible genotypes? 2.d
A)2
B)3
C)1
D)6
6.
Blood types in humans are an example of traits controlled by __________. 2.d
A)multiple alleles
B)offspring
C)only homozygous parents
D)pedigree
7.
A person with phenotype A blood has how many possible genotypes? 2.d
A)3
B)1
C)6
D)2
8.
Which pair of chromosomes produces a female offspring? 2.c
A)a female Y chromosome and a male Y 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 X chromosome.
9.
Which pair of chromosome produces a male offspring? 2.c
A)a female Y chromosome and a male X chromosome.
B)a female X chromosome and a male Y chromosome.
C)a female Y chromosome and a male Y chromosome.
D)a female X chromosome and a male X chromosome.
10.
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
11.
Which of these is usually the cause of human genetic disorders? 2.d
A)mucus
B)recessive genes
C)genetic engineering
D)incomplete dominance
Grade 7
Glencoe Online Learning CenterScience HomeProduct InfoSite MapContact Us

The McGraw-Hill CompaniesGlencoe

Please read our Terms of Use and Privacy Policy before you explore our Web site. To report a technical problem with this Web site, please contact the Web Producer.