Chapter 11 (Study Guide)

The location on a chromosome where a particular gene is located is known as the:
A. Allele
B. Dihybrid
C. Locus
D. Diploid
E. Autosome

Locus

Which of the following is NOT a trait that is the result of, or is affected by, the interaction of more than one gene?
A. Human skin color
B. Left palate
C. Height
D. Sickle cell anemia

Sickle cell anemia

Which of the following crosses would always result in offspring that only display the dominant phenotype?
A. TT x tt
B. Tt x Tt
C. TT x TT
D. Both TT x tt and TT x TT

Both TT x tt and TT x TT

What aspect of Mendel's background gave him the necessary tools to discover the laws of inheritance?
A. He was a monk
B. He was a teacher
C. He lived in Austria
D. He had studied mathematics and probability
E. He corresponded with Charles Darwin

He corresponded with Charles Darwin

What is the blending theory of inheritance?
A. Mendel's theory of how the traits of parents are passed to offspring through the gametes
B. Darwin's theory of how traits are passed from all parts of the parent's body into the gamete to be transmitted to the offspring
C. The modern theory of how genetic information is passed from parents to offspring
D. An old theory that said that offspring show traits intermediate between those of the parents

An old theory that said that offspring show traits intermediate between those of the parents

Which characteristic of pea plants was NOT important in their selection as Mendel's research organism?
A. Most other scientists of the time were also using peas, so a lot was known about them
B. Peas are easy to cultivate
C. Pea plants have a short generation time
D. Pea plants are self-pollinating but can be cross-fertilized easily
E. Many true-breeding verieties were available

Most other scientists of the time were also using peas, so a lot was known about them

In a Mendelian monohybrid cross, which generation is ALWAYS completely heterozygous?
A. F1 generation
B. F2 generation
C. F3 generation
D. P generation

F1 Generation

In a Mendelian monohybrid corss, which generation is ALWAYS completely HOMOZYGOUS?
A. F1 generation
B. F2 generation
C. F3 generation
D. P generation

P Generation

If a pea plant shows a recessive phenotype,
A. It can be either TT or Tt
B. Tt or tt
C. It can only be TT
D. It can only be tt

Only tt

The symbol "F" in the results of a teastcross stands for
A. Dominant
B. Recessive
C. First trait to show up
D. "Faulty" or unexpected results
E. Filial

Filial

The F2 offspring of a monohybrid cross would show the genotype(s)
A. AA and Aa
B. Aa and aa
C, AA, Aa, and aa
d. AA Only
E. Aa only

AA, Aa, and aa

The F1 offspring of a monohybrid cross would show the genotype(s)
A. AA and Aa
B. Aa and aa
C. AA, Aa, and aa
D. AA only
E. Aa only

Aa only

The offspring of a monohybrid testcross would show the genotype(s)
A. AA and Aa
B. Aa and aa
C. AA, Aa, and aa
D. AA only
E. aa only

Aa and aa

If an individual with a dominant phenotype is crossed with an individual with a recessive phenotype, 4 of their 9 offspring show the recessive phenotype. What is the genotype of the first parent?
A. AA
B. Aa
C. aa
D. The answer can not be detemined

Aa

Which is NOT true according to Mendel's law of segregation?
A. Each indicidual contains two factors for each trait
B. One factor must be dominant and one factor recessive in each individual
C. Factors seperate from each other during gamete formation
D. Each gamete contains one copy of each factor

One factor must be dominant and one factor recessive in each individual

In which kind of cross would you expect to find a ratio of 3:1 among the F2 offspring?
A. Monohybrid cross
B. Dihybrid cross
C. Testcross
D. None of the choices are correct

Monohybrid cross

If we locate a pea plant that is heterozygous for this trait, self-pollinate it and harvest seeds, what are the likely phenotypes of these seeds when they germinate?
A. All will be green with chlorophyll since that is the dominant trait
B. All will be white and lack chlorophyll since this is self-pollinated
C. About one-fourth will be white and three-fourths green since it is similar to a monohybrid cross

About one-fourth will be white and three-fourths green since it is similar to a monohybrid cross

If you had 2 guinea pigs of opposite sex, both homozygous, one black and one brown, but you didn't know which was the dominant characteristic, how will you find out the dominant color?
A. Mate them together and see what color the offspring are--thaty will be the dominant color
D. Mate them together and see what color the offspring are--the OTHER will be the dominant color

Mate them together and see what color the offspring are--thaty will be the dominant color

If you had 2 guinea pigs of opposite sex, both homozygous, one black and one brown, but you didn't know whichwas the dominant characteristic, how could you be certain that the guinea pigs are truly homozygous?
A. The guinea pigs would be homozygous for black (or brown) coat colorif each strain could be bred for many generations and only black (or brown) colored offspring were produced
B. If the immediate parents of the black (or brown) guinea pigs were both of that color, it produced

The guinea pigs would be homozygous for black (or brown) coat colorif each strain could be bred for many generations and only black (or brown) colored offspring were produced

The Greek root word for allele means
A. Gene
B. Hereditary
C. Mathematical
D. Parallel or reciprocal
E. Different

Parallel or reciprocal

The term based on the greek root words for "different" and "balance" or "yoke" is
A. Gene
B. Heterozygous
C. Genotype
D. Phenotype
E. Genetics

Heterozygous

"Genotype" is based on the Greek root words for
A. Appearance and shape
B. Hereditary and image
C. Mathematical and form
D. Birth or origin, and shape

Birth or origin, and shape

What are alleles?
A. Genes for different traits, such as hair color or eye color
B. Alternative forms of a gene for a single trait, such as blue eyes or brown eyes
C. The locations of genes on a chromosome
D. Recessive form of a kind of characteristic carried by a gene

Alternative forms of a gene for a single trait, such as blue eyes or brown eyes

Phenotype is based on the Greek root words for
A. Appearance and shape
B. Hereditary and image
C. Mathematical and form
D. Different and image

Appearance and shape

Un attached ear lobes question:
A. They can be certain that three will be heterozygous and one homo zygous
B. Two heterozygous, one homozygous recessive and one homozygous dominant is a likely outcome, but all heterozygous, or two, three, or all four homozygous are all possible

Two heterozygous, one homozygous recessive and one homozygous dominant is a likely outcome, but all heterozygous, or two, three, or all four homozygous are all possible

In1940, two researchers...
A. Two Rh+ parents could have a Rh- child
B. Two Rh- parents could have a Rh+ child
C. An Rh- child would require that both parents be carriers of at least one Rh- gene

Two Rh- parents could have an Rh+ child

Since each child of two heterozygous parents has a 1/4 chance of receiving a recessive trait from each parent,
A. If the first child is phenotypically recessive, then the next child must be phenotypically dominant
B. If the first child is phenotypically recessive, then the next child has a 3/4 chance of being phenotypically recessive
D. No matter what the first child's phenotype, the next child will have a 1/4 chance of being phenotypically recessive

No matter what the first child's phenotype, the next child will have a 1/4 chance of being phenotypically recessive

Tongue question:
A. A student who can roll his tongue has a mother and a father, both of whom cannot
B. A student who cannot roll his tongue has a mother and father, both of whom can
C. The non-tongue rollers who learn to roll their tongues and the student who can roll his tongue while his parents cannot are two situations BLAHBLAHBLAH

The non-tongue rollers who learn to roll their tongues and the student who can roll his tongue while his parents cannot are two situations BLAHBLAHBLAH

If the probability of event A us 3/4 and the probability of event B is 1/4, then the probability of both A and B occuring at the same time is
A. 3/4
B. 1/4
C. 1/2
D. 3/16

3/16

In which kind of cross would you expect to find exactly the anticipated ratios every time the cross is made?
A. Monohybrid cross
B. Dihybrid cross
C. Testcross
D. None of the above

None of the above

Computer stimulations.....
A. Rarely would exactly 100 fly offspring be produced or survive
B. An exact balance between males and females would be rare
C. A precise 3:1 ratio would be uncommon
D. All of the choices are true

All of the choices

In which kind of corss would you expect to find a ratio of 9:3:3:1 among the F2 offspring?
A. Monohybrid cross
B. Dihybrid cross
C. Testcross
D. None of the above

Dihybrid cross

In which kind of cross would you expect to find two different kinds of ratios among the offspring, either 1:1 or 1:1:1:1?
A. Monohybrid cross
B. Dihybrid cross
C. Testcross
D. None of the above

Testcross

Pea plant question...
What can be said of a fully heterozygous (or dihybrid) cross?
A. It is impossible to secure offspring that are homozygous for both dominant genes
B. It is impossible to secure offspring that are homozygous for both recessive genes
D. All of these choices are impossible combinations in a dyhybrid cross
A. All of these choices are possible combinations in a dihybrid cross

All of these choices are possible combinations in a dihybrid cross

A Testcross involves an individual exhibiting the dominant phenotype but an unknown genotype being crossed with an individual that as a(n) _____ genotype
A. Homozygous dominant
B. Heterozygous dominant
C. Homozygous recessive
D. Any of the above

Homozygous recessive

If an individual exhibiting a dominant phenotype are crossed and produced only offspring with the dominant phenotype, what would be the logical genotype of the parents?
A. Homozygous recessive
B. Heterozygous dominant
C. Homozygous dominant

Homozygous dominant

If the use of a Punnett square for genetic results of crossing individuals
A. Al different kinds of sperm are lined up either horizontally or vertically
B. All different kinds of eggs are lined up either horizontally or vertically
C. Every possible allel combination is placed within the square
D. The results show the offspring's expected genotype
E. All of the aboive

All of the above

Person who is a tongue roller marries a person with unattached ear lobes....
A. Yes; TtEe;ttee
B. Yes;TtEE;ttEe
C. No;TTEE; ttee

Yes; TtEe; ttee

The particulare theory of inheritance
A. Preceded Mendel's research by a century
B. Was proposed by Mendel
C. Is based on genes
D. All of the choices are correct

Is based on genes

Of the following, whichis not an autosomal dominant disorder?
A. Hutington's disease
B. Neurofibromatosis
C. Phenylketonuria
D. Achondroplasia

Phenylketonuria

An individual with the blood type A married someone with the blood type B. What blood type is their offspring?
A. AB
B. A
C. B
D. O
E. All of the choices are possible

All of the choices

The traits Mendel studies in garden peas showed
A. Complete dominance
B. Incomplete dominance
C. Epistasis
D. Pleiotropy

Complete dominance

When crossing a true-breeding red shapdragon glower with a true-breeding white flower of the same species..........
A. In the case of incomplete dominance, only radioactive isotope tracers can follow the actual hereditary particles
B. There is no way to directly prove incomplete dominance
C. It is possible that (1) over many generations the adverage )pink flowers) would remain, with no way to gedt back to pure red and white and (2)vit is possible to cross the pink F-1 generation and obtain a predictable portion of pure red and white flowers

It is possible that (1) over many generations the adverage )pink flowers) would remain, with no way to gedt back to pure red and white and (2)vit is possible to cross the pink F-1 generation and obtain a predictable portion of pure red and white flowers