Question 1

Match between columns
                        Premises: Animal species X is tetraploid (4 n = 12). Following gene duplication and translocation, a given gene is found on each chromosome. How many alleles for this gene can be present in an individual of this species?
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?
Plant species X is diploid (2 n = 24) and has a quantitative trait, the expression of which is controlled by gene loci on each of its chromosomes. What is the maximum number of alleles for this trait that any one individual of species X could have?
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?
In a dihybrid cross between a parent that is a double heterozygote ( Aa Bb ) and a parent that is homozygous recessive for one gene and heterozygous for the other ( aa Bb ), how many unique phenotypes potentially will be present in their offspring?

Accepted Answer

The Answer of 6 and 4. and 12 and 24 is...

Question 2

In the garden pea, Mendel found that tall ( D ) green pods ( G ) and inflated pods ( C ) were dominant to their alleles, dwarf ( d ) yellow pods ( g ), and constricted pods ( c ). Given the following genotypes, determine the chances of producing the offspring shown. 
 (a) DD Gg Cc x Dd Gg cc → DD gg Cc 
 (b) DD Gg Cc x Dd Gg Cc → tall green pod, constricted pod 
 (c) Dd Gg Cc x Dd GG cc → tall green pod, inflated pod 
 (d) Dd Gg Cc x Dd Gg Cc → D _ G _ cc 
 (e) Dd Gg Cc x Dd gg CC → D _ G _ C _ 
 (f) Dd gg cc x DD Gg cc → tall green pod, inflated pod 
 (g) Dd Gg Cc x Dd Gg Cc → Dd Gg Cc 
 (h) Dd Gg Cc x Dd Gg Cc → dd gg cc

Accepted Answer

The answer of In the garden pea, Mendel found that...

Question 3

The squares at #2 represent the ____ of the ____.
A) genotypes; parents
B) phenotypes; parents
C) genotypes; offspring
D) phenotypes; offspring
E) none of these

Accepted Answer

The answer of  The squares at #2 represent the...

Question 4

The probability of producing a child with cc at #4 is
A) 1/4.
B) 25 percent.
C) 1 out of 4.
D) 0.25.
E) all of these

Accepted Answer

The answer of  The probability of producing a child...

Question 5

In a certain breed of chicken, two genes control color. A dominant allele ( I ) inhibits expression of any color gene ( C ). A second recessive gene ( c ) results in albinism when homozygous ( cc ). Give the F ₂ white phenotypic ratio of a colored chicken ii CC with a chicken II cc .

Accepted Answer

The answer of In a certain breed of chicken, two...

Question 6

The appearance of the chins at #3 is called the
A) dominant allele.
B) genotype.
C) offspring.
D) recessive gene.
E) phenotype.

Accepted Answer

The answer of  The appearance of the chins at...

Question 7

In tomatoes, red ( R ) is dominant to yellow ( r ), tall ( D ) is dominant to dwarf ( d ), and smooth ( H ) is dominant to peach or hairy ( h ). 
 (a) How many different genotypes are there in relationship to these three characteristics? 
 (b) How many different phenotypes are there in relationship to these three characteristics? 
 (c) How many different homozygous pure-breeding forms can be produced?

Accepted Answer

The answer of In tomatoes, red ( R ) is...

Question 8

In sweet peas, genes C and P are necessary for colored flowers. In the absence of either (__  pp or cc  __), or both ( cc pp ), the flowers are white. Give the probable genotype of a plant with colored flowers and a plant with white flowers that produced 38 plants with colored flowers and 42 plants with white flowers.

Accepted Answer

The answer of In sweet peas, genes C and P...

Question 9

In mice, the allele for colored fur ( C ) is dominant to the allele for albinism ( c ). The allele ( W ) for normal behavior is dominant to that for waltzing movement ( w ). Give the probable genotypes of the parents if they produced the offspring listed after the following crosses: 
 (a) Colored normal x white waltzer produced 10 colored normal, 8 colored waltzers, 2 white waltzers, and 11 white normal. 
 (b) Colored normal x white normal produced 35 colored normal and 13 colored waltzers. 
 (c) Colored normal x colored normal produced 37 colored normal, 14 colored waltzers, 9 white normal, and 5 white waltzers.

Accepted Answer

The answer of In mice, the allele for colored fur...

Question 10

There are nine coat colors known in foxes. If a red fox were crossed with a double-black fox, all the hybrids would be red above and black below in a pattern known as a blended cross. If two blended crosses were mated, the F ₂ ratio would be as follows: 1 red, 2 smokey red, 2 cross red, 4 blended cross, 1 standard silver, 2 substandard silver, 1 Alaskan silver, 2 sub-Alaskan silver, and 1 double-black. (a) Using the letters A/a and B/b to serve as the genes for these animals, develop a genotype for each variety listed. (b) Two crosses will produce all blended-cross offspring. One is used above (red fox x double-black); what is the other? (c) List the genotype and phenotype of all the pure-breeding foxes. (d) Give the genotypic and phenotypic ratio of a cross between two substandard silvers. (e) Give the genotype and phenotype of the offspring produced in a cross of 1 sub-Alaskan silver and a cross red.

Accepted Answer

The answer of There are nine coat colors known in...

Question 11

If you were following the inheritance patterns of two different sets of multiple alleles located on different chromosomes, how many different possible gametes could be produced if locus 1 had five possible alleles and locus 2 had six alleles?

Accepted Answer

The answer of If you were following the inheritance patterns...

Question 12

In sweet peas, genes C and P are necessary for colored flowers. In the absence of either (__ pp or cc __), or both ( cc pp ), the flowers are white. What will be the color of the offspring of the crosses in what proportions for the following? 
 (a) Cc Pp x cc pp 
 (b) Cc Pp x Cc Pp 
 (c) Cc PP x Cc pp 
 (d) Cc pp x cc Pp

Accepted Answer

The answer of In sweet peas, genes C and P...

Question 13

In summer squash, spherical-shaped fruit has been shown to be dominant to elongated fruit. On one occasion, two different spherical varieties were crossed and produced all disk-shaped fruits. When these hybrid disk-shaped fruits were crossed, they produced 75 disk-shaped fruits, 48 spherical fruits, and 9 elongated fruits. Explain.

Accepted Answer

The answer of In summer squash, spherical-shaped fruit has been...

Question 14

Pure-breeding yellow guinea pigs crossed with pure-breeding white ones produce only cream-colored offspring. This pattern indicates incomplete dominance. Rough hair is found to be dominant to smooth hair. Give the F ₁ and F ₂ genotypic and phenotypic ratios of a cross of a smooth, white guinea pig with a homozygous, rough, yellow guinea pig.

Accepted Answer

The answer of Pure-breeding yellow guinea pigs crossed with pure-breeding...

Question 15

The genotype of the parent at #1 is
A) Cc .
B) cc .
C) heterozygous.
D) CC .
E) hemizygous.

Accepted Answer

The answer of  The genotype of the parent at...

Question 16

In cultivated stocks, the cross of a variety of white flower plants produced all red flowers in the F ₁ generation, but the F ₂ generation produced 87 red flowers, 31 cream flowers, and 39 white flowers. Explain these results by giving the genotypes possible for each phenotype.

Accepted Answer

The answer of In cultivated stocks, the cross of a...

Question 17

In a certain variety of plants, a cross between a red-flowered plant and a white-flowered plant produced an all-red flower F ₁. In the F ₂ there were 140 red-flowered plants, 50 cream-flowered plants, and 65 white-flowered plants. (a) Offer an explanation for this F ₂ ratio. (b) What ratio would be produced in a testcross of the F ₁ hybrid? (c) What ratio would be produced if all the white-flowered F ₂ plants were crossed among themselves?

Accepted Answer

The answer of In a certain variety of plants, a...

Quiz 19: Introduction to Genetics

Classification. Answer the questions using the group of answers below.

The squares at #2 represent the of the .

The probability of producing a child with cc at #4 is

In a certain breed of chicken, two genes control color. A dominant allele ( I ) inhibits expression of any color gene ( C ). A second recessive gene ( c ) results in albinism when homozygous ( cc ). Give the F ₂ white phenotypic ratio of a colored chicken ii CC with a chicken II cc .

The appearance of the chins at #3 is called the

If you were following the inheritance patterns of two different sets of multiple alleles located on different chromosomes, how many different possible gametes could be produced if locus 1 had five possible alleles and locus 2 had six alleles?

The genotype of the parent at #1 is

In cultivated stocks, the cross of a variety of white flower plants produced all red flowers in the F ₁ generation, but the F ₂ generation produced 87 red flowers, 31 cream flowers, and 39 white flowers. Explain these results by giving the genotypes possible for each phenotype.

Quiz 19: Introduction to Genetics

Classification. Answer the questions using the group of answers below.

The squares at #2 represent the ____ of the ____.

The probability of producing a child with cc at #4 is

In a certain breed of chicken, two genes control color. A dominant allele ( I ) inhibits expression of any color gene ( C ). A second recessive gene ( c ) results in albinism when homozygous ( cc ). Give the F 2 white phenotypic ratio of a colored chicken ii CC with a chicken II cc .

The appearance of the chins at #3 is called the

If you were following the inheritance patterns of two different sets of multiple alleles located on different chromosomes, how many different possible gametes could be produced if locus 1 had five possible alleles and locus 2 had six alleles?

The genotype of the parent at #1 is

In cultivated stocks, the cross of a variety of white flower plants produced all red flowers in the F 1 generation, but the F 2 generation produced 87 red flowers, 31 cream flowers, and 39 white flowers. Explain these results by giving the genotypes possible for each phenotype.

The squares at #2 represent the of the .

In a certain breed of chicken, two genes control color. A dominant allele ( I ) inhibits expression of any color gene ( C ). A second recessive gene ( c ) results in albinism when homozygous ( cc ). Give the F ₂ white phenotypic ratio of a colored chicken ii CC with a chicken II cc .

In cultivated stocks, the cross of a variety of white flower plants produced all red flowers in the F ₁ generation, but the F ₂ generation produced 87 red flowers, 31 cream flowers, and 39 white flowers. Explain these results by giving the genotypes possible for each phenotype.