a.
To explain:
Whether the statementBill has
Introduction:
Trisomy is the addition of a single chromosome in the whole set of chromosome. Addition of single chromosome refers to the gain of one extra homologous copy of individual chromosome. Trisomy is represented as
a.
Explanation of Solution
In the given case, it is nowhere mentioned that Bill is suffering from Down syndrome.
b.
To explain:
Whether the statement that Betty has
Introduction:
Trisomy is the addition of a single chromosome in the whole set of chromosome. Addition of single chromosome refers to the gain of one extra homologous copy of individual chromosome. Trisomy is represented as
b.
Explanation of Solution
In the given case, no information has been provided for Betty. It is nowhere mentioned that she is having a trisomy that is total number of chromosomes are
c.
To explain:
Whether the statement Bill and Betty’s children each have
Introduction:
Trisomy is the addition of a single chromosome in the whole set of chromosome. Addition of single chromosome refers to the gain of one extra homologous copy of individual chromosome. Trisomy is represented as
c.
Explanation of Solution
Both the children of Bill and Betty have Down syndrome. However, since Bill is normal, he must be the carrier for Robertsonian translocation. He will transmit translocated copy of chromosome
d.
To explain:
Whether the statement Bill’s sister has
Introduction:
Trisomy is the addition of a single chromosome in the whole set of chromosome. Addition of single chromosome refers to the gain of one extra homologous copy of individual chromosome. Trisomy is represented as
d.
Explanation of Solution
Since the children of both Bill and his sister have Down syndrome, this reflects that both Bill and his sister must be carrier for Robertsonian translocation. One of the chromosomes produced by Robertsonian translocation has long arms of both chromosome
d.
To explain:
Whether the statement Bill’s sister has
Introduction:
Trisomy is the addition of a single chromosome in the whole set of chromosome. Addition of single chromosome refers to the gain of one extra homologous copy of individual chromosome. Trisomy is represented as
d.
Explanation of Solution
Since the children of both Bill and his sister have Down syndrome, this reflects that both Bill and his sister must be carrier for Robertsonian translocation. One of the chromosomes produced by Robertsonian translocation has long arms of both chromosome
e.
To explain:
Whether the statement that Bill has
Introduction:
Trisomy is the addition of a single chromosome in the whole set of chromosome. Addition of single chromosome refers to the gain of one extra homologous copy of individual chromosome. Trisomy is represented as
e.
Explanation of Solution
The children of Bill have Down syndrome. The Down syndrome is passed from Bill as no history of Betty is given. Bill is the carrier of translocation of chromosome
f.
To explain:
Whether the statement Betty has
Introduction:
Trisomy is the addition of a single chromosome in the whole set of chromosome. Addition of single chromosome refers to the gain of one extra homologous copy of individual chromosome. Trisomy is represented as
f.
Explanation of Solution
The children of Bill have Down syndrome. In the family of Bill, familial Down syndrome is getting transmitted. So Bill is the carrier of Robertsonian translocation, and Betty has normal number of chromosomes. So, the statement that Betty has
g.
To explain:
Whether the statement Bill’s brother has
Introduction:
Trisomy is the addition of a single chromosome in the whole set of chromosome. Addition of single chromosome refers to the gain of one extra homologous copy of individual chromosome. Trisomy is represented as
g.
Explanation of Solution
Bill’s brother has Down syndrome and he is not the carrier for Robertsonian translocation. He must be having
Down syndrome is the trisomy of chromosome
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Chapter 8 Solutions
Genetics: A Conceptual Approach
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