Parontal generation Long brtstles Gray body Short bristles Ebony body stso'e sse0 Tostcross F, hotorozygote Homozygous rocessive Individual F2 gonoration s'so'e Sse'e Long bristles Gray body Nonrecombinant Short bristlos Ebony body Nonrecombinant Long bristles Ebony body Recombinant Short bristles Gray body Rocombinant Total: 537 542 76 75 Use of a testcross to distinguish between recombinant and nonrecombinant offspring - The parental generation begins with two different true-breeding strains to produce an F1 heterozygote. In the testcross, an F1 female that is heterozygous for both genes (s+se+e) is crossed to a male that is homozygous recessive for short bristles (ss) and ebony body (ee). The F2 recombinant offspring carry a chromosome that is the product of a crossover. (Note: Crossing over does not occur during sperm formation in Drosophila, which is unusual among eukaryotes. Therefore, the heterozygote in a testcross involving Drosophila must be the female.)
Parontal generation Long brtstles Gray body Short bristles Ebony body stso'e sse0 Tostcross F, hotorozygote Homozygous rocessive Individual F2 gonoration s'so'e Sse'e Long bristles Gray body Nonrecombinant Short bristlos Ebony body Nonrecombinant Long bristles Ebony body Recombinant Short bristles Gray body Rocombinant Total: 537 542 76 75 Use of a testcross to distinguish between recombinant and nonrecombinant offspring - The parental generation begins with two different true-breeding strains to produce an F1 heterozygote. In the testcross, an F1 female that is heterozygous for both genes (s+se+e) is crossed to a male that is homozygous recessive for short bristles (ss) and ebony body (ee). The F2 recombinant offspring carry a chromosome that is the product of a crossover. (Note: Crossing over does not occur during sperm formation in Drosophila, which is unusual among eukaryotes. Therefore, the heterozygote in a testcross involving Drosophila must be the female.)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
Related questions
Topic Video
Question
In the mapping example in Fig 2, the dominant alleles were on one chromosome and the recessive alleles were on the homolog. Let’s consider a twofactor cross in which the dominant allele for one gene is on one
chromosome, but the dominant allele for a second gene is on the
homolog. A cross is made between AAbb and aaBB parents. The F1
offspring are AaBb. The F1 heterozygotes are then testcrossed to aabb
individuals. Which F2 offspring are recombinant?
![Parontal generation
Long brtstles
Gray body
Short bristles
Ebony body
stso'e
sse0
Tostcross
F, hotorozygote
Homozygous
rocessive
Individual
F2 gonoration
s'so'e
Sse'e
Long bristles
Gray body
Nonrecombinant
Short bristlos
Ebony body
Nonrecombinant
Long bristles
Ebony body
Recombinant
Short bristles
Gray body
Rocombinant
Total:
537
542
76
75
Use of a testcross to distinguish between recombinant and nonrecombinant offspring - The parental generation begins
with two different true-breeding strains to produce an F1 heterozygote. In the testcross, an F1 female that is
heterozygous for both genes (s+se+e) is crossed to a male that is homozygous recessive for short bristles (ss) and
ebony body (ee). The F2 recombinant offspring carry a chromosome that is the product of a crossover.
(Note: Crossing over does not occur during sperm formation in Drosophila, which is unusual among eukaryotes. Therefore,
the heterozygote in a testcross involving Drosophila must be the female.)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F6b03b427-31e6-42b1-a342-b1bcb6f535db%2Fbad59672-8fb7-4507-a23e-3f29b7b59973%2Fnez3llu.jpeg&w=3840&q=75)
Transcribed Image Text:Parontal generation
Long brtstles
Gray body
Short bristles
Ebony body
stso'e
sse0
Tostcross
F, hotorozygote
Homozygous
rocessive
Individual
F2 gonoration
s'so'e
Sse'e
Long bristles
Gray body
Nonrecombinant
Short bristlos
Ebony body
Nonrecombinant
Long bristles
Ebony body
Recombinant
Short bristles
Gray body
Rocombinant
Total:
537
542
76
75
Use of a testcross to distinguish between recombinant and nonrecombinant offspring - The parental generation begins
with two different true-breeding strains to produce an F1 heterozygote. In the testcross, an F1 female that is
heterozygous for both genes (s+se+e) is crossed to a male that is homozygous recessive for short bristles (ss) and
ebony body (ee). The F2 recombinant offspring carry a chromosome that is the product of a crossover.
(Note: Crossing over does not occur during sperm formation in Drosophila, which is unusual among eukaryotes. Therefore,
the heterozygote in a testcross involving Drosophila must be the female.)
Expert Solution
![](/static/compass_v2/shared-icons/check-mark.png)
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 2 steps with 1 images
![Blurred answer](/static/compass_v2/solution-images/blurred-answer.jpg)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Recommended textbooks for you
![Human Anatomy & Physiology (11th Edition)](https://www.bartleby.com/isbn_cover_images/9780134580999/9780134580999_smallCoverImage.gif)
Human Anatomy & Physiology (11th Edition)
Biology
ISBN:
9780134580999
Author:
Elaine N. Marieb, Katja N. Hoehn
Publisher:
PEARSON
![Biology 2e](https://www.bartleby.com/isbn_cover_images/9781947172517/9781947172517_coverImage_Textbooks.gif)
Biology 2e
Biology
ISBN:
9781947172517
Author:
Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:
OpenStax
![Anatomy & Physiology](https://www.bartleby.com/isbn_cover_images/9781259398629/9781259398629_smallCoverImage.gif)
Anatomy & Physiology
Biology
ISBN:
9781259398629
Author:
McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:
Mcgraw Hill Education,
![Human Anatomy & Physiology (11th Edition)](https://www.bartleby.com/isbn_cover_images/9780134580999/9780134580999_smallCoverImage.gif)
Human Anatomy & Physiology (11th Edition)
Biology
ISBN:
9780134580999
Author:
Elaine N. Marieb, Katja N. Hoehn
Publisher:
PEARSON
![Biology 2e](https://www.bartleby.com/isbn_cover_images/9781947172517/9781947172517_coverImage_Textbooks.gif)
Biology 2e
Biology
ISBN:
9781947172517
Author:
Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:
OpenStax
![Anatomy & Physiology](https://www.bartleby.com/isbn_cover_images/9781259398629/9781259398629_smallCoverImage.gif)
Anatomy & Physiology
Biology
ISBN:
9781259398629
Author:
McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:
Mcgraw Hill Education,
![Molecular Biology of the Cell (Sixth Edition)](https://www.bartleby.com/isbn_cover_images/9780815344322/9780815344322_smallCoverImage.gif)
Molecular Biology of the Cell (Sixth Edition)
Biology
ISBN:
9780815344322
Author:
Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter Walter
Publisher:
W. W. Norton & Company
![Laboratory Manual For Human Anatomy & Physiology](https://www.bartleby.com/isbn_cover_images/9781260159363/9781260159363_smallCoverImage.gif)
Laboratory Manual For Human Anatomy & Physiology
Biology
ISBN:
9781260159363
Author:
Martin, Terry R., Prentice-craver, Cynthia
Publisher:
McGraw-Hill Publishing Co.
![Inquiry Into Life (16th Edition)](https://www.bartleby.com/isbn_cover_images/9781260231700/9781260231700_smallCoverImage.gif)
Inquiry Into Life (16th Edition)
Biology
ISBN:
9781260231700
Author:
Sylvia S. Mader, Michael Windelspecht
Publisher:
McGraw Hill Education