Chromosomes | Effects of Gene Location | Mutations | Inheritance of Traits | Genetic Traits and Disorders |
---|---|---|---|---|
Female:: XX as Male::
XY
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Where does a sex-linked chromosomes occur?
Most commonly in males
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What are the effects of a mutation?
Neutral, harmful, and helpful
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What is a pedigree?
A diagram in which several generations of a family and the occurrence of certain genetic characteristics
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What is the blood type of a person who inherited an A allele from one parent and an O from another?
Type A
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What determines the sex of an offspring?
The father/male
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What is color blindness if the allele for color blindness is located on the X chromosome
Sex-linked
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What is a mutation?
A change in gene due to damage or incorrect copying
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What is a sex-influenced trait?
A one in which male and female can show difference in phenotypes while having the same genotype.
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What can the risks of passing on a genetic disorder to ones children can be assessed by?
Genetic counseling, prenatal testing, analysis of a pedigree.
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What are the sex chromosomes
The X and Y chromosomes
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What genetic disorder does an offspring have with 47 chromosomes?
Down Syndrome
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What happens in nondisjunction?
A gamete will receive too many or too few copies of a chromosomes.
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What is the generation name of an offspring who's parents were homozygous recessive and homozygous dominant?
F2
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Why Is it for not females to get the disease Hemophilia?What is the chance an offspring will inherit Cystic fibrosis if both the parents are carriers of the recessive allele?
1 in 4
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What is substitution
when one nucleotide replaces another
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What is nondisjunction?
Failure of replicated chromosomes to separate
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What is a frame shift?
A mutation in which remaining codons are grouped incorrectly?
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Blood type is controlled by how many alleles?
At least 2
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Why Is it for not females to get the disease Hemophilia?
A female could get the disease only by having a mother who is a carrier and a father who has the disease. This is unlikely since most males with the disease do not survive the reproductive age
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What is point-mutation
a change that occurs within a single gene or other segment of DNA on a chromosome
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What is crossing over?
Linked genes separating from each other in mitosis
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What is translocation?
A mutation caused by a piece of DNA breaking away from its chromosome and becoming attached to a non-homologous chromosome
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What is a carrier?
A person who is heterozygous for a recessive disorder.
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What is the gene coding for a disease in a family where the disease was found equally in males and females and the effected parent's offspring?
Autosomal dominant
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