AnswersIS - O - 3490 - The Living Earth B CP OnlineLab: Mouse Genetics (One Trait)

Lab: Mouse Genetics (One Trait) — Unit test Answers

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1
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Corn can be injected with herbicide-tolerant recombinant DNA. Which type of organism is herbicide-tolerant corn?

A
infertile organism
B
purebred organism
C
transgenic organism
D
recombinant organism
2
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Which is an application of DNA technology in medicine?

A
mapping human genes for manipulation
B
determining specific traits that a baby will have before its conception
C
producing disease resistant humans
D
determining hereditary diseases in individuals and families
3

Round seeds and yellow seed color are dominant to wrinkled seeds and green seed color. Which Punnett square represents the correct way to set up the cross RRYy ´ RrYY?

A
A 4-column Punnett square has 4 rows. The columns are labeled Upper R Upper Y, Upper R y, r Upper Y, r y. The rows are labeled Upper R Upper Y, Upper R y, r Upper y, r y.
Option A
B
A 4-column Punnett square has 4 rows. The columns are labeled Upper R Upper Y, Upper R y, r Upper Y, r y. The rows are labeled Upper R Upper Y, Upper R y, Upper R Upper y, Upper R y.
Option B
C
A 4-column Punnett square has 4 rows. The columns are labeled Upper R Upper Y, Upper R Upper Y, r Upper Y, r Upper Y. The rows are labeled Upper R Upper Y, Upper R y, Upper R Upper Y, Upper R y.
Option C
D
A 4-column Punnett square has 4 rows. The columns are labeled Upper R Upper Y, Upper R Upper Y, r Upper Y, r Upper Y. The rows are labeled Upper R Upper Y, Upper R Upper Y, Upper R Upper Y, Upper R Upper y.
Option D
4

A cross is performed between a bird that is homozygous for red feathers and a bird that is homozygous for blue feathers. Purple offspring result due to incomplete dominance. Then, two of the purple offspring are crossed. What proportion of the offspring from the second cross will be purple?

A
1 in 4
B
2 in 4
C
3 in 4
D
4 in 4
5

If Mendel had crossed a true breeding dominant plant with a true breeding recessive plant, in which of the three generations is the recessive trait visible?

A
F1 generation only
B
P generation only
C
F1 generation and F2 generation
D
P generation and F2 generation
6

Red-green color blindness is an X-linked recessive disorder. What is the probability of the offspring having red-green color blindness for the cross that is represented by the Punnett square?

Question illustration
A
0 percent
B
25 percent
C
50 percent
D
75 percent
7

The pedigree traces red-green color blindness. Which family members have red-green color blindness?

Question illustration
A
Sam, Tim, Bella, and Joshua
B
Lisa and Monica
C
Ben, Jenny, Mike, Carol, Katie, and Chris
D
Sam, Joshua, and Tim
8

Which scenario breaks the law of segregation?

A
a gamete contains the father’s allele
B
the gametes produced each have 1 allele after meiosis II
C
a gamete produced has 2 of the same alleles after meiosis II
D
the gamete fertilized has the dominant trait
9

Error

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Answer not available
10

Error

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Answer not available
11

A plant that has round and yellow seeds (RrYy) is crossed with a plant that has round and yellow seeds (RrYy). What is the ratio of the offspring that will have round and yellow seeds?Key: R = round r = wrinkled Y = yellow y = green

A
1:16
B
3:16
C
8:16
D
9:16
12

Which career combines DNA technology and medicine?

A
nutriceuticals
B
paternity testing
C
environmental studies
D
genetics
13

The graph shows the change in the number of Bt and HT crops grown in the United States from 1996 to 2005. Bt crops are resistant to being eaten by insects. HT crops are resistant to herbicides (weed killers). Based on the information in the graph, which is most likely true about farming in 2005?

Question illustration
A
Fewer crops were grown with herbicides.
B
More crops needed to be sprayed with pesticides.
C
Fewer crops were eaten by pests.
D
More crops needed to be sprayed with herbicides.
14

Which blood type could be given as a transfusion for patient with AB blood when the RH factor is unknown?

A
O+
B
A+
C
AB+
D
AB–
15

Parents with the genotypes AO and AB have a child. What are all the possible blood types of the child?

A
A, B
B
O, AB
C
A, AB, B
D
O, AB, A
16

The graph shows the change in the number of Bt and HT crops grown in the United States from 1996 to 2005. Bt crops are resistant to being eaten by insects. HT crops are resistant to herbicides (weed killers). Based on the information in the graph, which is most likely true about farming in 2005?

Question illustration
A
Fewer crops were grown with herbicides.
B
More crops needed to be sprayed with pesticides.
C
Fewer crops were eaten by pests.
D
More crops needed to be sprayed with herbicides.
17

Cystic fibrosis is a genetic disorder. It is a recessive trait that is determined by two alleles. Suppose two parents each carry at least one recessive allele, but neither of them has cystic fibrosis. Which statement reflects the likelihood of a child of these parents having cystic fibrosis?

A
The child cannot have the disease because only the dominant alleles will be passed on.
B
The child will have the disease because only recessive alleles will be passed on.
C
The child may or may not have the disease because a recessive gene from each parent may be passed on.
D
The child may or may not have the disease because the disease does not depend on the alleles of the parents.
18

Mendel was able to study seven traits in all the pea plants in each generation. Which of his hypotheses allowed him to analyze each trait separately?

A
If two different alleles for a gene occur together, one of the alleles may be expressed while the other is hidden.
B
When gametes are formed, each gamete carries only one allele for the gene.
C
There are alternate versions of a alleles called genes.
D
For each inherited trait, there is only one copy of the gene that codes for that trait.
19

If Mendel had crossed a true breeding dominant plant with a true breeding recessive plant, in which of the three generations is the recessive trait visible?

A
F1 generation only
B
P generation only
C
F1 generation and F2 generation
D
P generation and F2 generation
20

Pedigrees help geneticists understand how traits are inherited between generations. Red-green color blindness is a sex-linked disorder that is determined by a recessive allele on the X chromosome.If Brian has a son who is color-blind, what is known about the genotype of the son's mother?

Question illustration
A
She must have at least one allele for color blindness.
B
She must have two alleles for color blindness.
C
She cannot be homozygous recessive for the gene for color blindness.
D
She cannot be a heterozygous carrier of the gene for color blindness.

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