1) Two parents are affected by a disease but genetic testing shows that some of their...
1) Two parents are affected by a disease but genetic testing shows that some of their children don't have the disease allele at all. Which one of the reasons below could best explain this?
A) The allele is X-linked and didn't affect their sons
B) The allele causing the disease is co-dominant
C) The allele causing the disease is autosomal dominant
D) The allele causing the disease is autosomal recessive
2) Which one of these stages results in an increase in the total amount of genetic material per cell?
A) meiosis 1
B) anaphase 2
C) mitosis
D) S phase
Homework Answers
Answer:
1). C) The allele causing the disease is autosomal dominant
Explanation:
AA or Aa = disease
aa = Normal
Aa (diseased) x Aa (diseased)---Parents
|
A |
a |
|
|
A |
AA (diseased) |
Aa (diseased) |
|
a |
Aa (diseased) |
aa (normal) |
Disease = 75%
Normal =25%
2). D). S phase
Explanaiton:
S phase is called synthetic phase. During S phase, genetic material will replicated therby the amount of genetic material will be doubled.
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2) indicate whether the transmission appears dominant or
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3) provide at least two characteristics for each that support
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In general, the following characteristics suggest (but do not prove) specific inheritance patterns: Autosomal recessive inheritance: -affected individuals can be born to unaffected parents -if both parents are affected, all children are affected -observable effect of relatedness (consanguinity) -horizontal" inheritance: trait appears at...
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