Question 1

A testcross involves ____.

Accepted Answer

A) two individuals with dominant traits 
B) two homozygous dominant individuals 
C) two homozygous recessive individuals 
D) an individual with a dominant trait and a heterozygous individual 
E) an individual with a dominant trait and a homozygous recessive individual 
A) two individuals with dominant traits 
B) two homozygous dominant individuals 
C) two homozygous recessive individuals 
D) an individual with a dominant trait and a heterozygous individual 
E) an individual with a dominant trait and a homozygous recessive individual

Question 2

Someone with type AB blood could have which combination of alleles?

Accepted Answer

A) A and A 
B) A and B 
C) B and B 
D) A and O 
E) B and O 
A) A and A 
B) A and B 
C) B and B 
D) A and O 
E) B and O

Question 3

​In Labrador retrievers, dogs with alleles E and B have black fur. Those with an E and two recessive b alleles have brown fur. Dogs homozygous for the recessive e allele have yellow fur. This is an example of _____.

Accepted Answer

A) ​complete dominance 
B) ​incomplete dominance 
C) ​codominance 
D) ​pleiotropy 
E) ​epistasis 
A) ​complete dominance 
B) ​incomplete dominance 
C) ​codominance 
D) ​pleiotropy 
E) ​epistasis

Question 4

In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant over spotted (s). If a solid red male was crossed with a solid black female to produce a spotted red puppy, the genotypes of the parents (with male genotype first) would be ____.

Accepted Answer

A) Bb Ss × Bb Ss 
B) bb Ss × Bb Ss 
C) bb ss × Bb Ss 
D) bb Ss × Bb ss 
E) Bb ss × Bb ss 
A) Bb Ss × Bb Ss 
B) bb Ss × Bb Ss 
C) bb ss × Bb Ss 
D) bb Ss × Bb ss 
E) Bb ss × Bb ss

Question 5

Short hair (L) is dominant to long hair (l). Suppose a short-haired animal of unknown genotype is crossed with a long-haired animal and they produce one long-haired and one short-haired offspring. What do these results indicate?

Accepted Answer

A) The short-haired animal was homozygous. 
B) The short-haired animal was heterozygous. 
C) The long-haired animal was heterozygous. 
D) Both the long-haired and short haired animals were heterozygous. 
E) None of these can be determined with these two offspring. 
A) The short-haired animal was homozygous. 
B) The short-haired animal was heterozygous. 
C) The long-haired animal was heterozygous. 
D) Both the long-haired and short haired animals were heterozygous. 
E) None of these can be determined with these two offspring.

Question 6

Match the term with the most appropriate description.​
-​Effect in which the full and separate phenotypic effects of two alleles are apparent in heterozygous individuals.

Accepted Answer

A) codominance 
B) multiple allele system 
C) epistasis 
D) pleiotropy 
E) incomplete dominance 
A) codominance 
B) multiple allele system 
C) epistasis 
D) pleiotropy 
E) incomplete dominance

Question 7

​A cross between two individuals identically hybrid for one gene is called a ____ cross.

Accepted Answer

A) ​purebred 
B) ​test 
C) ​homozygote 
D) ​monohybrid 
E) ​dihybrid 
A) ​purebred 
B) ​test 
C) ​homozygote 
D) ​monohybrid 
E) ​dihybrid

Question 8

A linkage group is composed of all ____.

Accepted Answer

A) traits that are controlled by one gene 
B) genes that control one trait 
C) genes on all chromosomes within a cell 
D) genes on a chromosome 
E) genes that are segregated during meiosis 
A) traits that are controlled by one gene 
B) genes that control one trait 
C) genes on all chromosomes within a cell 
D) genes on a chromosome 
E) genes that are segregated during meiosis

Question 9

A gene that produces multiple effects is called a(n) ____.

Accepted Answer

A) multiple allele 
B) autosome 
C) epistatic gene 
D) pleiotropic gene 
E) incompletely dominant gene 
A) multiple allele 
B) autosome 
C) epistatic gene 
D) pleiotropic gene 
E) incompletely dominant gene

Question 10

If shape and color of radishes are both due to genes with incompletely dominant alleles, crossing two dihybrid heterozygotes will produce how many different phenotypes?

Accepted Answer

A) 2 
B) 3 
C) 4 
D) 5 
E) 9 
A) 2 
B) 3 
C) 4 
D) 5 
E) 9

Question 11

​Which genotype(s) can produce type A blood?

Accepted Answer

A) ​AA 
B) ​AO 
C) ​AB 
D) ​AA or AO 
E) ​AA or AB 
A) ​AA 
B) ​AO 
C) ​AB 
D) ​AA or AO 
E) ​AA or AB

Question 12

The ABO gene is an example of a(n) ____.

Accepted Answer

A) incomplete dominant system 
B) pleiotropic gene 
C) multiple gene system 
D) multiple allele system 
E) multiple chromosome system. 
A) incomplete dominant system 
B) pleiotropic gene 
C) multiple gene system 
D) multiple allele system 
E) multiple chromosome system.

Question 13

Suppose that researchers find a difference in methylation patterns of one gene between two individuals. What may have influenced this difference?

Accepted Answer

A) environment 
B) gene sequence 
C) codominance 
D) translation controls 
E) pleiotropic effects 
A) environment 
B) gene sequence 
C) codominance 
D) translation controls 
E) pleiotropic effects

Question 14

Pleiotropic genes ____.

Accepted Answer

A) act on secondary sexual characteristics 
B) influence more than one aspect of phenotype 
C) are additive 
D) produce lethal effects when homozygous 
E) are multiple genes that influence one trait 
A) act on secondary sexual characteristics 
B) influence more than one aspect of phenotype 
C) are additive 
D) produce lethal effects when homozygous 
E) are multiple genes that influence one trait

Question 15

​Which genotype(s) can produce type O blood?

Accepted Answer

A) ​AO 
B) ​BO 
C) ​OO 
D) ​AO or OO 
E) ​AO, BO, or OO 
A) ​AO 
B) ​BO 
C) ​OO 
D) ​AO or OO 
E) ​AO, BO, or OO

Question 16

All of the traits Mendel studied in pea plants assorted into gametes independently, although some were actually located on the same chromosome. Which process separated these genes from each other, allowing for this assortment?

Accepted Answer

A) codominance 
B) pleiotropy 
C) epistasis 
D) crossing over 
E) mitosis 
A) codominance 
B) pleiotropy 
C) epistasis 
D) crossing over 
E) mitosis

Question 17

In radishes, red is dominant (RR), white is recessive (rr), and purple color results in heterozygotes (Rr). This is an example of ____.

Accepted Answer

A) incomplete dominance 
B) codominance 
C) pleiotropy 
D) epistasis 
E) Mendelian inheritance pattern 
A) incomplete dominance 
B) codominance 
C) pleiotropy 
D) epistasis 
E) Mendelian inheritance pattern

Question 18

In fruit flies, red eyes (R) are dominant to sepia eyes (r), and the presence of wings (A) is dominant to wingless (a) flies. If two flies heterozygous for each trait are crossed (RrAa × RrAa), how many different phenotypes would be produced in the offspring?

Accepted Answer

A) 2 
B) 3 
C) 4 
D) 5 
E) 9 
A) 2 
B) 3 
C) 4 
D) 5 
E) 9

Question 19

Which genotype(s) produce(s) a dominant phenotype?

Accepted Answer

A) aa only 
B) Aa only 
C) AA only 
D) Aa and AA 
E) AA and aa 
A) aa only 
B) Aa only 
C) AA only 
D) Aa and AA 
E) AA and aa

Question 20

Marfan syndrome is a genetic disorder that arises from the mutation in a single gene. This gene, however, has multiple effects in the body. It affects tissue composition of the heart, skin, blood vessels, tendons, and other parts of the body. This gene is an example of a(n) ____.

Accepted Answer

A) multiple allele system 
B) epistatic gene 
C) pleiotropic gene 
D) dominant allele 
E) environmentally controlled gene 
A) multiple allele system 
B) epistatic gene 
C) pleiotropic gene 
D) dominant allele 
E) environmentally controlled gene

Exam 13: Patterns in Inherited Traits

A testcross involves ____.

Someone with type AB blood could have which combination of alleles?

​In Labrador retrievers, dogs with alleles E and B have black fur. Those with an E and two recessive b alleles have brown fur. Dogs homozygous for the recessive e allele have yellow fur. This is an example of _____.

In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant over spotted (s). If a solid red male was crossed with a solid black female to produce a spotted red puppy, the genotypes of the parents (with male genotype first) would be ____.

Short hair (L) is dominant to long hair (l). Suppose a short-haired animal of unknown genotype is crossed with a long-haired animal and they produce one long-haired and one short-haired offspring. What do these results indicate?

Match the term with the most appropriate description.​ -​Effect in which the full and separate phenotypic effects of two alleles are apparent in heterozygous individuals.

​A cross between two individuals identically hybrid for one gene is called a ____ cross.

A linkage group is composed of all ____.

A gene that produces multiple effects is called a(n) ____.

If shape and color of radishes are both due to genes with incompletely dominant alleles, crossing two dihybrid heterozygotes will produce how many different phenotypes?

​Which genotype(s) can produce type A blood?

The ABO gene is an example of a(n) ____.

Suppose that researchers find a difference in methylation patterns of one gene between two individuals. What may have influenced this difference?

Pleiotropic genes ____.

​Which genotype(s) can produce type O blood?

All of the traits Mendel studied in pea plants assorted into gametes independently, although some were actually located on the same chromosome. Which process separated these genes from each other, allowing for this assortment?

In radishes, red is dominant (RR), white is recessive (rr), and purple color results in heterozygotes (Rr). This is an example of ____.

In fruit flies, red eyes (R) are dominant to sepia eyes (r), and the presence of wings (A) is dominant to wingless (a) flies. If two flies heterozygous for each trait are crossed (RrAa × RrAa), how many different phenotypes would be produced in the offspring?

Which genotype(s) produce(s) a dominant phenotype?

Marfan syndrome is a genetic disorder that arises from the mutation in a single gene. This gene, however, has multiple effects in the body. It affects tissue composition of the heart, skin, blood vessels, tendons, and other parts of the body. This gene is an example of a(n) ____.

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Filters

In Labrador retrievers, dogs with alleles E and B have black fur. Those with an E and two recessive b alleles have brown fur. Dogs homozygous for the recessive e allele have yellow fur. This is an example of _____.

Match the term with the most appropriate description. -Effect in which the full and separate phenotypic effects of two alleles are apparent in heterozygous individuals.

A cross between two individuals identically hybrid for one gene is called a ____ cross.

Which genotype(s) can produce type A blood?

Which genotype(s) can produce type O blood?