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Genetics Unit Summative

Last updated almost 2 years ago
21 questions
1

What does genotype Tt mean?

1

In pea plants, the trait for being tall (T) is dominant and the trait for being short (t) is recessive. Two heterozygous tall pea plants are crossed. What is the probability of their offspring being tall? (Make a Punnett square to SHOW YOUR WORK)

1

Use the information to answer the following question.

Nose color is an inherited trait in dogs. Two puppies from the same set of parents have different color noses. One puppy has a pink nose and one puppy has a black nose.

How can puppies from the same set of parents have different color noses?

1

In tulips, alleles for purple petals are dominant to alleles for white petals.
Which of the following explanations BEST describes what color petals the
tulip will have if they inherit one dominant allele for purple petals and one
recessive allele for white petals?

1

Use the information to answer the following question.

A student is doing a genetics experiment on beetles. A pure green beetle is crossed with a pure brown beetle. The student repeats this experiment ten more times. Every time the student performs this cross, all of the offspring are green.

What can the student conclude?

1

In squirrels, gray fur (G) is dominant over white fur (g). A homozygous gray squirrel (GG) is crossed with a homozygous white squirrel (gg). What are the possible genotypes of the offspring? (Make a Punnett square to SHOW YOUR WORK)

1

Use the information to answer the following question.


Based on the results, which statement must be TRUE of the parents in this cross?

1

Use the information and Punnett square to answer the following question.

Imagine brown eyes are dominant over green eyes. The Punnett square shows a cross between two parents with brown eyes.



What is the probability that the parents will produce an offspring with green eyes?

1

The Punnett square shows the results of a genetic cross. The mother is heterozygous for the trait shown. The father is homozygous recessive for the trait.

Which choice uses the Punnett square to BEST characterize the relationship
between traits of the potential offspring and their parent(s)?

1

In certain rats, black fur is dominant over white fur. If two rats that are both
heterozygous for fur color are mated and produce 40 offspring, which of the
following BEST represents the likely outcome from the cross?

1

Use the information and Punnett square to answer the following question.

Although brown feathers are dominant, a peacock breeder makes more money when they sell birds with blue feathers rather than birds with brown feathers. The breeder wants to produce as many blue-feathered peacock offspring as possible when they breed their birds. The farmer has some blue and some brown birds and wants to. Identify which birds may carry a blue gene. The farmer performs test crosses with four different breeding pairs of birds. The results are in the table shown.



Based on the results of the test cross, the brown parent(s) from which of the pairs can be identified with certainty as heterozygous for feather trait?

1

In mice, black fur is dominant to white fur. Two mice with black fur are
placed in the same cage and have several litters. Of all the offspring, 7 mice
have white fur and 19 mice have black fur. Which of the following crosses
could produce this combination?

1

Use the information and model to answer the following question.
Two students were asked to develop a model to represent the offspring of sexual reproduction in organisms. They developed the models shown.


Which student correctly developed the model of sexual reproduction and why?

1

Use the information and model to answer the following question.
Reproduction of the two-parent cats below resulted in offspring. Some of the
offspring are white, some are black, some are gray, and some are spotted.


How did variation in the offspring MOST LIKELY occur?

1

Single celled organisms can reproduce and create cells exactly like themselves without combining genes from two different parent cells. When they do this, they use what type of reproduction?

1

A heterozygous short hair guinea pig and a long hair guinea pig are in the same cage and have several litters, totaling 36 offspring with a variety of fur lengths. In guinea pigs, short hair is dominant to long hair. Which of the following is an appropriate estimate of the total offspring that could have short hair? (Make a Punnett square to SHOW YOUR WORK)

1

Use the information and graph below to answer the question that follows. Scientists have been documenting the life expectancy of two organisms over several generations.


What can be concluded by using this graph about the relationship between the parent and offspring?

1

What is the term that describes the process of choosing parent organisms for desired characteristics?

1

Use the information to answer the following question.

Dairy cows are selectively bred for larger udders to produce more milk. A
disadvantage of this selective breeding is that these cows with larger udders are more likely to have a trait that results in the cow having difficulties producing offspring.

Which BEST defines a situation when selective breeding for udder size might no longer be advantageous for the dairy cow farmers?

1

A farmer wants to breed only grey peacocks since he can sell them for more
money than the regular peacocks. What is the BEST question to ask to
determine the effects of breeding the grey peacocks?

0

Conceptual Question: How can human intervention with genetics result in both positive and negative consequences?

Think about what we have learned over the course of the unit. Provide a specific example of how human intervention with genetics has resulted in positive and negative consequences.