Question 1

Heritable units of information about traits are called __________.

Accepted Answer

The answer of Heritable units of information about traits are...

Question 2

In mice,the allele for colored fur (C)is dominant to the allele for albinism (c).The allele for normal behavior (W)is dominant to that for waltzing movement (w).Give the probable genotypes of the parents if a colored normal crossed with a white waltzer produced 10 colored normal,8 colored waltzers,2 white waltzers,and 11 white normal.

Accepted Answer

A)  Cc Ww x cc ww 
B)  CC Ww x cc Ww 
C)  Cc Ww x Cc Ww 
D)  CC ww x cc ww 
E)  Cc Ww x Cc ww

Question 3

Environmental effects can cause the following responses except

Accepted Answer

A)  altered metabolic pathways. 
B)  altered response to stress. 
C)  altered genotypes. 
D)  altered reproductive patterns. 
E)  altered phenotypes.

Question 4

Height,weight,and eye color are examples of phenotypes that illustrate

Accepted Answer

A)  codominance. 
B)  continuous variation. 
C)  pleiotropy. 
D)  incomplete dominance. 
E)  multiple allele systems.

Question 5

Figure 13.11
 
-The F2 phenotypic ratio of 9:3:4,as shown above,is a result of a cross involving

Accepted Answer

A)  two genes expressing complete dominance. 
B)  a gene expressing dominance and another gene expressing codominance. 
C)  two genes expressing codominance. 
D)  epistasis, in which one gene modifies the expression of the other gene. 
E)  multiple alleles.

Question 6

In garden peas,one pair of alleles controls the height of the plant,and a second pair of alleles controls flower color.The allele for tall (D)is dominant to the allele for dwarf (d),and the allele for purple (P)is dominant to the allele for white (p).A tall plant with white flowers crossed with a dwarf plant with purple flowers produces 1/4 tall purple,1/4 tall white,1/4 dwarf purple,and 1/4 dwarf white.What is the genotype of the parents?

Accepted Answer

A)  Dd Pp x Dd pp 
B)  Dd Pp x Dd Pp 
C)  DD Pp x dd Pp 
D)  Dd pp x dd Pp 
E)  DD Pp x dd pp

Question 7

The process of cell division called ___________assorts gene pairs of homologous chromosomes independently of gene pairs on all other chromosomes.

Accepted Answer

The answer of The process of cell division called ___________assorts...

Question 8

Various forms that a single gene can take at a given locus are called

Accepted Answer

A)  kinetochores. 
B)  alleles. 
C)  autosomes. 
D)  loci. 
E)  chromatids.

Question 9

A hybrid with two nonidentical alleles (Aa)expresses a phenotype that is between the dominant and recessive forms.This type of inheritance pattern is called _________

Accepted Answer

The answer of A hybrid with two nonidentical alleles (Aa)expresses...

Question 10

Answer the following questions using the group of answers below.
-In a dihybrid cross between a parent that is a double heterozygote (Aa Bb)and a parent that is homozygous dominant for one gene and heterozygous for the other (AA Bb),how many unique genotypes potentially will be present in their offspring?

Accepted Answer

A) 4 
B) 6 
C) 8 
D) 12 
E) 24

Question 11

Which eye color has dense melanin deposits in the iris?

Accepted Answer

A)  Blue 
B)  Gray 
C)  Brown 
D)  Green 
E)  Brown and blue

Question 12

In tomatoes,red (R)is dominant to yellow (r),tall (D)is dominant to dwarf (d),and smooth (H)is dominant to hairy (h).How many possible different phenotypes are there in relationship to these three characteristics?

Accepted Answer

A)  6 
B)  8 
C)  9 
D)  16 
E)  27

Question 13

According to Mendel,if a male that is homozygous for the dominant form (PP)of a trait is crossed with a female that is homozygous for the recessive (pp)form of a trait,all offspring will show the ____ form of the trait.

Accepted Answer

A)  sex-linked 
B)  dominant 
C)  recessive 
D)  codominant 
E)  lethal

Question 14

Stress-induced depression has been found to be a result of which of the following?

Accepted Answer

A)  Weakened immune response 
B)  DNA methylation of a nerve growth factor gene 
C)  Hormonal changes 
D)  Seasonal changes 
E)  Exposure to blue light

Question 15

If black fur color is controlled by a dominant allele (B)and brown by its recessive allele (b),give the genotypes of the parents if a black male crossed with a brown female and produces 1/2 black offspring and 1/2 brown offspring.

Accepted Answer

A)  BB male and bb female 
B)  Bb male abd bb female 
C)  Bb male and Bb female 
D)  BB male and BB female 
E)  bb male and Bb female

Question 16

In garden peas,one pair of alleles controls the height of the plant,and a second pair of alleles controls flower color.The allele for tall (D)is dominant to the allele for dwarf (d),and the allele for purple (P)is dominant to the allele for white (p).A tall plant with purple flowers crossed with a tall plant with purple flowers produces 3/4 tall purple and 1/4 tall white.What is the genotype of the parents?

Accepted Answer

A)  Dd Pp x Dd pp 
B)  Dd Pp x DD Pp 
C)  DD Pp x dd Pp 
D)  Dd pp x dd Pp 
E)  DD Pp x dd pp

Question 17

In sweet peas,dominant alleles C and P are necessary for colored flowers.In the absence of either (__ pp or cc __)or both (cc pp),the flowers are white.A cross between a plant with colored flowers and a plant with white flowers that produced 38 plants with colored flowers and 42 plants with white flowers could be written as _______.

Accepted Answer

The answer of In sweet peas,dominant alleles C and P...

Question 18

White fruit color in summer squash is influenced by a dominant allele W,whereas colored fruit must be ww.In the presence of ww,a dominant gene G results in yellow fruit,and homozygous gg results in green fruit.The F2 phenotypic ratios resulting from a cross of a true-breeding plant with white fruit (genotype WW GG)with a plant with green fruit will result in which phenotypic ratios?

Accepted Answer

A)  8/16 white, 4/16 yellow, 4/16 green 
B)  12/16 white, 3/16 yellow, 1/16 green 
C)  4/16 white, 8/16 yellow, 4/16 green 
D)  12/16 white, 2/16 yellow, 2/16 green 
E)  8/16 white, 8/16 green

Question 19

A pure-breeding population of a __________ trait is easier to establish from a mixed population.

Accepted Answer

The answer of A pure-breeding population of a __________ trait...

Question 20

Answer the following questions using the group of answers below.
-In a dihybrid cross between a parent that is a double heterozygote (Aa Bb)and a parent that is a double homozygous recessive (aa bb),how many unique phenotypes potentially will be present in their offspring?

Accepted Answer

A) 4 
B) 6 
C) 8 
D) 12 
E) 24

Exam 13: Observing Patterns in Inherited Traits

Heritable units of information about traits are called __________.

Environmental effects can cause the following responses except

Height,weight,and eye color are examples of phenotypes that illustrate

Figure 13.11 -The F2 phenotypic ratio of 9:3:4,as shown above,is a result of a cross involving

The process of cell division called ___________assorts gene pairs of homologous chromosomes independently of gene pairs on all other chromosomes.

Various forms that a single gene can take at a given locus are called

A hybrid with two nonidentical alleles (Aa)expresses a phenotype that is between the dominant and recessive forms.This type of inheritance pattern is called _________

Which eye color has dense melanin deposits in the iris?

In tomatoes,red (R) is dominant to yellow (r) ,tall (D) is dominant to dwarf (d) ,and smooth (H) is dominant to hairy (h) .How many possible different phenotypes are there in relationship to these three characteristics?

According to Mendel,if a male that is homozygous for the dominant form (PP) of a trait is crossed with a female that is homozygous for the recessive (pp) form of a trait,all offspring will show the ____ form of the trait.

Stress-induced depression has been found to be a result of which of the following?

If black fur color is controlled by a dominant allele (B) and brown by its recessive allele (b) ,give the genotypes of the parents if a black male crossed with a brown female and produces 1/2 black offspring and 1/2 brown offspring.

A pure-breeding population of a __________ trait is easier to establish from a mixed population.

Answer the following questions using the group of answers below. -In a dihybrid cross between a parent that is a double heterozygote (Aa Bb) and a parent that is a double homozygous recessive (aa bb) ,how many unique phenotypes potentially will be present in their offspring?