7280719
Descripción
Test por Jack Alkema, actualizado hace más de 1 año
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Creado por Jack Alkema
hace más de 7 años
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Pregunta 1
Pregunta
Each pea-plant gamete has how many alleles for the height gene?
Respuesta
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1
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2
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3
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4
Pregunta 2
Pregunta
A mule is the result of a cross between a donkey and a horse. A mule is a
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phenotype
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hybrid
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genotype
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tetrad
Pregunta 3
Pregunta
If a pea plant has a recessive allele for green peas, it will produce
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green peas if it also has a dominant allele for yellow peas.
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yellow peas if it does not also have a dominant allele for green peas.
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both green peas and yellow peas if it also has a dominant allele for yellow peas.
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green peas if it does not also have a dominant allele for yellow peas.
Pregunta 4
Pregunta
When Gregor Mendel crossed a tall plant with a short plant, the F1 plants inherited
Respuesta
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four alleles from each parent
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three alleles from each parent
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two alleles from each parent
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one allele from each parent
Pregunta 5
Pregunta
When you flip a coin, what is the probability that it will come up tails?
Respuesta
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1/4
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1/8
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1/2
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1
Pregunta 6
Pregunta
The principles of probability can be used to
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decide which organisms are best to use in genetic crosses.
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determine the actual outcomes of genetic crosses.
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predict the traits of the offspring of genetic crosses.
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determine which species should be used in genetic crosses.
Pregunta 7
Pregunta
A heterozygous tall pea plant is crossed with a short plant. The probability that an F1 plant will be tall is
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75%
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25%
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100%
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50%
Pregunta 8
Pregunta
Organisms that have two identical alleles for a particular trait are said to be
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dominent
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heteorzygous
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hybrid
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homozygous
Pregunta 9
Pregunta
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)
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All are expected to be short.
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All are expected to be tall.
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About three fourths are expected to be tall.
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About half are expected to be short.
Pregunta 10
Pregunta
If a pea plant’s alleles for height are tt, what is true of its parents?
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Both parents were short
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Both parents contributed a recessive allele.
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Both parents were tall
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Both parents contributed a dominant allele.
Pregunta 11
Pregunta
A tall plant (TT) is crossed with a short plant (tt). If the tall F1 pea plants are allowed to self-pollinate,
Respuesta
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all of the offsprings will be tall
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the offspring can be either tall or short
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the offspring will be of medium height.
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all of the offsprings will be short
Pregunta 12
Pregunta
What principle states that during gamete formation genes for different traits separate without influencing each other’s inheritance?
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principle of probabilities
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principle of segregation
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principle of independent assortment
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principle of dominance
Pregunta 13
Pregunta
The Punnett square in Figure 11–2 shows that the gene for pea shape and the gene for pea color
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are linked.
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are always homozygous.
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have the same alleles.
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assort independently.
Pregunta 14
Pregunta
How many different allele combinations would be found in the gametes produced by a pea plant whose genotype was RrYY?
Respuesta
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2
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4
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8
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16
Pregunta 15
Pregunta
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?
Respuesta
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8
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2
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16
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4
Pregunta 16
Pregunta
Gregor Mendel’s principles of genetics apply to
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animals only.
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all organisms.
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plants only.
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pea plants only.
Pregunta 17
Pregunta
Why did Thomas Hunt Morgan use fruit flies in his studies?
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Fruit flies produce a large number of offspring.
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Fruit flies share certain characteristics with pea plants.
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Fruit flies have a long life span.
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Fruit flies take a long time to produce offspring.
Pregunta 18
Pregunta
A trait is a specific characteristic that varies from one individual to another.
Respuesta
- True
- False
Pregunta 19
Pregunta
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.
Respuesta
- True
- False
Pregunta 20
Pregunta
During the formation of gametes in a hybrid tall plant, the tall allele and the short allele stay together.
Respuesta
- True
- False
Pregunta 21
Pregunta
The principles of probability can explain the numerical results of Mendel’s experiments.
Respuesta
- True
- False
Pregunta 22
Pregunta
The probability that a gamete produced by a pea plant heterozygous for stem height (Tt) will contain the recessive allele is 100%.
Respuesta
- True
- False
Pregunta 23
Pregunta
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.
Respuesta
- True
- False
Pregunta 24
Pregunta
The plants that Gregor Mendel crossed to produce the F1 generation made up the [blank_start]____________________[blank_end] generation.
Respuesta
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P
Pregunta 25
Pregunta
What is the probability of flipping a coin and getting heads 5 times in a row?
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1/2
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1/4
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1/8
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1/16
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1/32
Pregunta 26
Pregunta
In the Punnett square shown in Figure 11–1, the genotypes of the offspring are [blank_start]____________________[blank_end].
Respuesta
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TT and Tt
Pregunta 27
Pregunta
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 [blank_start]_________________________[blank_end].
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round and yellow
Pregunta 28
Pregunta
What is the phenotype ratio of the offspring of the plants in the Punnett square in Figure 11–2?
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The phenotype ratio is 9 round, yellow seeds : 3 round, green seeds : 3 wrinkled, yellow seeds : 1 wrinkled, green seed.
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The phenotype ratio is 3 round, yellow seeds : 9 round, green seeds : 3 wrinkled, yellow seeds : 1 wrinkled, green seed.
Pregunta 29
Pregunta
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?
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70
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50
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10
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30
Pregunta 30
Pregunta
Interpret Tables Identify the genotype of the offspring that would be represented by the blank space in Figure 11–6.[blank_start]t[blank_end]
Respuesta
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bbRR
Pregunta 31
Pregunta
Interpret Tables Identify the phenotype of the offspring represented by the blank space in Figure 11–6.[blank_start]t[blank_end]
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White and Rough hair
Pregunta 32
Pregunta
Analyze Data In Figure 11–6, what are the different phenotypes of the offspring?
Respuesta
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white with rough hair
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black with smooth hair
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white with smooth hair
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brown with smooth hair
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black with rough hair
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brown with rough hair
Pregunta 33
Pregunta
Analyze Data In Figure 11–6, what are the genotypes of the offspring that have black, rough hair?
Respuesta
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bbRR
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BbRR
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BBrr
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bbrr
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BBRR
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BBRr
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BbRr
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Bbrr
Pregunta 34
Pregunta
Calculate What fraction of the offspring in Figure 11–6 would be expected to have white, smooth hair?[blank_start]d[blank_end]
Respuesta
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1/16
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