are known to be on separate chromosomes. In the course of a routine mating check experiment, a breeder got the following results upon crossing T/t:R/r with a double recessive strain (t/tr/r): Number of progeny genotype T/t; R/r t/t; r/r T/t; r/r t/t; R/r In addition to these data she noted that the cobs contain only about 50% of the expected kernels. Note that in corn, each kernel is the result of one mating or can be considered one progeny. Hence 50% of the matings are not producing viable offspring. 98 104 3 5
are known to be on separate chromosomes. In the course of a routine mating check experiment, a breeder got the following results upon crossing T/t:R/r with a double recessive strain (t/tr/r): Number of progeny genotype T/t; R/r t/t; r/r T/t; r/r t/t; R/r In addition to these data she noted that the cobs contain only about 50% of the expected kernels. Note that in corn, each kernel is the result of one mating or can be considered one progeny. Hence 50% of the matings are not producing viable offspring. 98 104 3 5
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

Transcribed Image Text:2. In corn the genes for tassel length (alleles T and t) and rust resistance (alleles R and r)
are known to be on separate chromosomes. In the course of a routine mating check
experiment, a breeder got the following results upon crossing T/t:R/r with a double
recessive strain (t/t/r):
Number of progeny
genotype
T/t; R/r
t/t; r/r
T/t; r/r
t/t; R/r
In addition to these data she noted that the cobs contain only about 50% of
the expected kernels. Note that in corn, each kernel is the result of one
mating or can be considered one progeny. Hence 50% of the matings are
not producing viable offspring.
a. Based on the location of these genes on separate chromosomes what is the
98
104
3
5
expected result?
b. Suggest a hypothesis of a genetic process that could be used to explain the
potential karyotype of one of these parents.
c. What are the actual genotypes of the parents?
d. Draw a diagram (hand drawn diagrams are fine just scan the image and insert it
into your exam as picture) showing the arrangement of the alleles on the
parental chromosomes.
e. Based on your hypothesis from part b, reassign genotypes to the progeny
classes. Enter your new genotypes into the table above as an additional column.
f. If the karyotype was done on the progeny what unusual feature would be
observed?
Expert Solution

This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 3 steps with 1 images

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)
Biology
ISBN:
9780134580999
Author:
Elaine N. Marieb, Katja N. Hoehn
Publisher:
PEARSON

Biology 2e
Biology
ISBN:
9781947172517
Author:
Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:
OpenStax

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)
Biology
ISBN:
9780134580999
Author:
Elaine N. Marieb, Katja N. Hoehn
Publisher:
PEARSON

Biology 2e
Biology
ISBN:
9781947172517
Author:
Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:
OpenStax

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)
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
Biology
ISBN:
9781260159363
Author:
Martin, Terry R., Prentice-craver, Cynthia
Publisher:
McGraw-Hill Publishing Co.

Inquiry Into Life (16th Edition)
Biology
ISBN:
9781260231700
Author:
Sylvia S. Mader, Michael Windelspecht
Publisher:
McGraw Hill Education