2. Below is a diagram of both homologs of chromosome 1 in a cell that is about the undergo DNA replication and meiosis. This cell has two different alleles of gene B, giving it the genotype Bb, as shown below. Each line represents one double-stranded DNA molecule. t A. Which of the following sets of diagrams accurately represents the same chromosomes after DNA replication, and before anything else happens? Choose one. a. B+ b b. oto oto b b со внь ьав C. During meiosis I in this cell, only one chiasma forms on chromosome 1. The chiasma is located on the short arm of the chromosome. Draw a diagram of both of the two cells that result from meiosis I, showing chromosome 1, and alleles o D. The same original cell also has two different alleles of gene E, E and e. Gene E is located on a different chromosome, Chromosome 3. Considering both genes B and E, what are all the possible gamete genotypes that could result from this meiosis? List them here.
2. Below is a diagram of both homologs of chromosome 1 in a cell that is about the undergo DNA replication and meiosis. This cell has two different alleles of gene B, giving it the genotype Bb, as shown below. Each line represents one double-stranded DNA molecule. t A. Which of the following sets of diagrams accurately represents the same chromosomes after DNA replication, and before anything else happens? Choose one. a. B+ b b. oto oto b b со внь ьав C. During meiosis I in this cell, only one chiasma forms on chromosome 1. The chiasma is located on the short arm of the chromosome. Draw a diagram of both of the two cells that result from meiosis I, showing chromosome 1, and alleles o D. The same original cell also has two different alleles of gene E, E and e. Gene E is located on a different chromosome, Chromosome 3. Considering both genes B and E, what are all the possible gamete genotypes that could result from this meiosis? List them here.
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,...
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Transcribed Image Text:2. Below is a diagram of both homologs of chromosome 1 in a cell that is about the undergo DNA
replication and meiosis. This cell has two different alleles of gene B, giving it the genotype Bb, as
shown below. Each line represents one double-stranded DNA molecule.
A. Which of the following sets of diagrams accurately represents the same chromosomes
after DNA replication, and before anything else happens? Choose one.
...
a.
b.
1.1
b
b
B+ b
C. Bb b + B
C. During meiosis I in this cell, only one chiasma forms on chromosome 1. The chiasma is
located on the short arm of the chromosome. Draw a diagram of both of the two cells that result from
meiosis I, showing chromosome 1, and alleles o
D. The same original cell also has two different alleles of gene E, E and e. Gene E is located
on a different chromosome, Chromosome 3. Considering both genes B and E, what are all the
possible gamete genotypes that could result from this meiosis? List them here.
Expert Solution
Step 1
The two chromosomes represent maternal and the paternal allele. They both get duplicated at the time of DNA replication.
Each will be replicated individually
In first option they are not being replicated. Therefore, this wont be the answer.
In the second option they are replicated individually. Therefore, its true
In the third option the pair of chromosome has been replicated. But thats not true.
therefore, for the first question the answer will be b.
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