Answers41111de1 ECAD Fall 2026 - Q2 - NM-Biology - S1Lab: Mouse Genetics (One Trait)

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

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1
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The pedigree traces red-green color blindness. Which family members have red-green color blindness?

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A
Sam, Tim, Bella, and Joshua
B
Lisa and Monica
C
Ben, Jenny, Mike, Carol, Katie, and Chris
D
Sam, Joshua, and Tim
2
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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
3

A company has many genetically engineered poplar trees around its factories. Which best describes the poplar trees?

A
They are being used for phytoremediation.
B
They have transferred their genes to a nontarget species.
C
They have reduced the effectiveness of pesticides.
D
They are being used for disease resistance.
4

Error

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Answer not available
5

Which best describes biotechnology?

A
the process of analyzing DNA samples to identify individuals involved in criminal activities
B
DNA made by connecting fragments of DNA with desired traits from different DNA sources
C
the field of biology that uses genetic engineering to produce crops, pharmaceuticals, and enzymes for use in industry and manufacturing
D
the process of cutting DNA into fragments and inserting the fragments with a desired gene into another organism
6

Error

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Answer not available
7

DDT was widely used as a pesticide for 20 years. Its use was banned after studies showed severe side effects were evident in humans, the environment, and animals as a result of DDT. Which reason best explains why the side effects of DDT were so harmful?

A
DDT kills insects and other pests.
B
DDT decomposes.
C
DDT was genetically engineered.
D
DDT bioaccumulates.
8

Some flowering plants appear to have offspring that have traits that are intermediate between those of the parents. Which type of dominance is exhibited by the offspring?

A
complete dominance
B
blended dominance
C
codominance
D
incomplete dominance
9

Mendel’s pea plants had either purple or white flowers. This means that the plants

A
can self-pollinate.
B
have two recessive traits.
C
have two alleles for the gene.
D
have two copies of a gene from one parent.
10

Which are different forms of the same gene?

A
genotypes
B
phenotypes
C
alleles
D
traits
11

There are health concerns surrounding the products that have been genetically engineered for particular traits, including pharmaceuticals, crops, and enzymes that are used in industry and manufacturing processes. Which is a health concern that affects society?

A
patented products
B
bioaccumulation
C
land use
D
cancer
12

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
13

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.
14

The Punnett square predicts the ratio of genotypes in the offspring based on the genotypes of the parents. Which Punnett square represents a cross between a mom who is heterozygous for dimples and a dad who is homozygous for no dimples?

A
A Punnett square is shown. The columns are labeled Upper D and Upper D. The rows are labeled d and d. Clockwise from upper left the boxes contain: Upper D d, Upper D d, Upper D d, Upper D d.
Option A
B
A Punnett square is shown. The columns are labeled Upper D and d. The rows are labeled d and d. Clockwise from upper left the boxes contain: Upper D d, d d, d d, Upper D d.
Option B
C
A Punnett square is shown. The columns are labeled Upper D and d. The rows are labeled Upper D and d. Clockwise from upper left the boxes contain: Upper D Upper D, Upper D d, d d, UpperD d.
Option C
D
A Punnett square is shown. The columns are labeled Upper D and Upper D. The rows are labeled Upper D and Upper D. Clockwise from upper left the boxes contain: Upper D Upper D, Upper D Upper D, Upper D Upper D, Upper D Upper D.
Option D
15

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
16

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
17

Hemophilia is an X-linked recessive disorder that is passed through generations and can be traced by using a pedigree. Who has hemophilia in the pedigree that is shown?

Question illustration
A
John and Ann
B
Fred and Luke
C
John, Charles, Jack, and Irene
D
Ann and Marie

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