Each pea-plant gamete has how many alleles for the height gene?
1
2
3
4
A mule is the result of a cross between a donkey and a horse. A mule is a
phenotype
hybrid
genotype
tetrad
If a pea plant has a recessive allele for green peas, it will produce
green peas if it also has a dominant allele for yellow peas.
yellow peas if it does not also have a dominant allele for green peas.
both green peas and yellow peas if it also has a dominant allele for yellow peas.
green peas if it does not also have a dominant allele for yellow peas.
When Gregor Mendel crossed a tall plant with a short plant, the F1 plants inherited
four alleles from each parent
three alleles from each parent
two alleles from each parent
one allele from each parent
When you flip a coin, what is the probability that it will come up tails?
1/4
1/8
1/2
The principles of probability can be used to
decide which organisms are best to use in genetic crosses.
determine the actual outcomes of genetic crosses.
predict the traits of the offspring of genetic crosses.
determine which species should be used in genetic crosses.
A heterozygous tall pea plant is crossed with a short plant. The probability that an F1 plant will be tall is
75%
25%
100%
50%
Organisms that have two identical alleles for a particular trait are said to be
dominent
heteorzygous
homozygous
In the Punnett square shown in Figure 11–1, which of the following is true about the offspring resulting from the cross? (T=tall and t=short)
All are expected to be short.
All are expected to be tall.
About three fourths are expected to be tall.
About half are expected to be short.
If a pea plant’s alleles for height are tt, what is true of its parents?
Both parents were short
Both parents contributed a recessive allele.
Both parents were tall
Both parents contributed a dominant allele.
A tall plant (TT) is crossed with a short plant (tt). If the tall F1 pea plants are allowed to self-pollinate,
all of the offsprings will be tall
the offspring can be either tall or short
the offspring will be of medium height.
all of the offsprings will be short
What principle states that during gamete formation genes for different traits separate without influencing each other’s inheritance?
principle of probabilities
principle of segregation
principle of independent assortment
principle of dominance
The Punnett square in Figure 11–2 shows that the gene for pea shape and the gene for pea color
are linked.
are always homozygous.
have the same alleles.
assort independently.
How many different allele combinations would be found in the gametes produced by a pea plant whose genotype was RrYY?
8
16
Use Figure 11–3 to answer the following question. If a pea plant that is heterozygous for round, yellow peas (RrYy) is crossed with a pea plant that is homozygous for round peas but heterozygous for yellow peas (RRYy), how many different phenotypes are their offspring expected to show?
Gregor Mendel’s principles of genetics apply to
animals only.
all organisms.
plants only.
pea plants only.
Why did Thomas Hunt Morgan use fruit flies in his studies?
Fruit flies produce a large number of offspring.
Fruit flies share certain characteristics with pea plants.
Fruit flies have a long life span.
Fruit flies take a long time to produce offspring.
A trait is a specific characteristic that varies from one individual to another.
True-breeding plants that produced axial flowers were crossed with true-breeding plants that produced terminal flowers. The resulting offspring all produced terminal flowers because the allele for terminal flowers is recessive.
During the formation of gametes in a hybrid tall plant, the tall allele and the short allele stay together.
The principles of probability can explain the numerical results of Mendel’s experiments.
The probability that a gamete produced by a pea plant heterozygous for stem height (Tt) will contain the recessive allele is 100%.
A trait in an unidentified plant is controlled by one gene that has two alleles. One allele is dominant over the other. According to Mendel’s principles, one fourth of the offspring made from a cross between two heterozygous plants will show the recessive trait.
The plants that Gregor Mendel crossed to produce the F1 generation made up the generation.
What is the probability of flipping a coin and getting heads 5 times in a row?
1/16
1/32
In the Punnett square shown in Figure 11–1, the genotypes of the offspring are .
If pea plants that are homozygous for round, yellow seeds (RRYY) were crossed with pea plants that are heterozygous for round, yellow seeds (RrYy), the expected phenotype(s) of the offspring would be .
What is the phenotype ratio of the offspring of the plants in the Punnett square in Figure 11–2?
The phenotype ratio is 9 round, yellow seeds : 3 round, green seeds : 3 wrinkled, yellow seeds : 1 wrinkled, green seed.
The phenotype ratio is 3 round, yellow seeds : 9 round, green seeds : 3 wrinkled, yellow seeds : 1 wrinkled, green seed.
A tall pea plant with yellow seeds is heterozygous for height and seed color (TtYy). This plant is crossed with a pea plant heterozygous for height but homozygous recessive for seed color (Ttyy). If 80 offspring are produced, how many are expected to be tall and have yellow seeds?
70
50
10
30
Interpret Tables Identify the genotype of the offspring that would be represented by the blank space in Figure 11–6.
Interpret Tables Identify the phenotype of the offspring represented by the blank space in Figure 11–6.
Analyze Data In Figure 11–6, what are the different phenotypes of the offspring?
white with rough hair
black with smooth hair
white with smooth hair
brown with smooth hair
black with rough hair
brown with rough hair
Analyze Data In Figure 11–6, what are the genotypes of the offspring that have black, rough hair?
bbRR
BbRR
BBrr
bbrr
BBRR
BBRr
BbRr
Bbrr
Calculate What fraction of the offspring in Figure 11–6 would be expected to have white, smooth hair?
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