Biology: The Dynamics of Life, California Edition

Chapter 10: Mendel and Meiosis

Mendel and Meiosis

1.
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This diagram shows how pea plants can be used to conduct monohybrid crosses. What is the genotype for the P1 Tall pea plant?
A)Tt
B)TT
C)F1
D)F2
2.
When Mendel conducted his experiments, he needed to transfer pollen grains from a male reproductive organ to a female reproductive organ in a plant. What is this process called?
A)monohybrid
B)heredity
C)cross pollination
D)recessive
3.
When a cell contains two of each kind of chromosome, it is called __________.
A)a haploid cell
B)a fertilized cell
C)a recessive cell
D)a diploid cell
4.
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Which of these squares has the tt genotype?
A)2 and 3
B)only 4
C)2 and 4
D)only 1
5.
In which phase of meiosis can crossing over occur?
A)prophase I
B)anaphase II
C)telophase II
D)metaphase I
6.
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What is the genotype ratio for the offspring in this Punnett Square?
A)2TT: 1Tt: 1tt
B)1TT: 2Tt: 1tt
C)2TT: 1Tt: 2tt
D)4TT: 2Tt: 1tt
7.
Female and male sex cells are called __________.
A)gametes
B)alleles
C)genotypes
D)hybrids
8.
Which of these diagrams shows metaphase I of meiosis I?
A)<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0078665809/181857/ch10_0_c.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (4.0K)</a>
B)<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0078665809/181857/ch10_0_d.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (4.0K)</a>
C)<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0078665809/181857/ch10_0_e.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (4.0K)</a>
D)<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0078665809/181857/ch10_0_f.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (4.0K)</a>
9.
Which condition occurs when a human zygote has 47 chromosomes?
A)No special condition occurs. This is the normal number of human chromosomes.
B)genetic recombination
C)interphase
D)Down's syndrome
10.
Which of these statements is true?
A)Two chromosomes of each pair in a diploid cell are called homologous chromosomes.
B)Meiosis and mitosis are the same processes.
C)Organisms with extra chromosomes will never survive.
D)All organisms are polyploids and have 17 chromosome sets.
11.
When a male gamete unites with the female gamete, the result is called _________.
A)a cross
B)heterozygous
C)its genotype
D)a zygote
12.
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What is the phenotype ratio for the offspring in this Punnett Square?
A)9 round yellow; 3 round green: 3 wrinkled yellow: 9 wrinkled green
B)9 round yellow; 3 round green: 3 wrinkled yellow: 1 wrinkled green
C)3 round yellow; 9 round green: 1 wrinkled yellow: 3 wrinkled green
D)3 round yellow; 3 round green: 3 wrinkled yellow: 3 wrinkled green
13.
When an organism has two alleles for a trait that are the same, it is said to be __________ for that trait.
A)heterozygous
B)homozygous
C)segregated
D)monohybrid
14.
How many different kinds of eggs or sperm can a human being produce?
A)23
B)223
C)232
D)2+ 23 = 25
15.
Which of the following statements is NOT true?
A)A hybrid is the offspring of two parents that have different forms of a trait.
B)The way an organism looks and behaves is called its genotype.
C)If an organism has two alleles for a trait that are the same, it is said to be homozygous for that trait.
D)Dominant alleles are represented with upper-case letters.
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