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Genetics Unit 2
Mendelian Genetics, Inheritance Patterns, Punnett Squares, Pedigrees, Karyotypes
53
Biology
10th Grade
12/10/2014

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Term
karyotype
Definition
a picture of an organisms chromosomes
-arranged from largest to smallest
-used to diagnose some types of genetic diseases
-notations include number of chromosomes, gender, and disorder area
Term
pedigree
Definition
a "family tree" drawn with shapes and symbols.
-used to track a trait or disorder through a family
-can help identify inheritance pattern
Term
homzygous
Definition
two alleles that are the same
Term
heterozygous
Definition
two alleles that are different
Term
genotype
Definition
combination of alleles on an organisms chromosomes
Term
phenotype
Definition
the appearance of a trait due to genes
Term
Mendel
Definition
Gregor, father of genetics, studied peas and probability of traits
Term
Codominance
Definition
When both alleles are exhibited, show up
Term
Intermediate or Incomplete Dominance
Definition
When neither allele is completely dominant and therefore they both show up in a blended form
Term
Sex-linked
Definition
When the trait is carried on the X or Y chromosome. Typically appears in one gender more than the other
Term
Multiple Alleles
Definition
Inheritance pattern where a single gene can have more than two alleles
Term
Polygenic
Definition
An Inheritance pattern where several genes control a trait.
Term
complete dominance
Definition
Inheritance pattern that Mendel determined. One allele is completely dominant over another
Term
Give example(s) of sex-linked disorders
Definition
Male pattern baldness, red-green colorblindness, Hemophilia
Term
Give example(s) of disorders caused by the wrong chromosome number
Definition
Down's Syndrome, Trisomy 13 or 18 or 21, Klinefelters, Turners
Term
Give example(s) of autosomal dominant disorders
Definition
Huntingtons, Achondroplasia
Term
Give example(s) of autosomal recessive disorders
Definition
Cystic Fibrosis, Albinism
Term
Which letters are assigned to a heterozygous genotype?
Definition
Aa
Term
Which letters are assigned to a homozygous recessive genotype?
Definition
aa
Term
Which letters are assigned to a homozygous dominant genotype?
Definition
AA
Term
A black chicken and a white chicken produce gray chicks, what inheritance pattern is this?
Definition
intermediate or incomplete
Term
A red candy and a white candy produce a "peppermint", what inheritance pattern is this?
Definition
codominance
Term
Men are more likely to develop these disorders, what inheritance pattern is this?
Definition
sex-linked
Term
A man with size 12 shoes has 7 children with a women with size 5 shoes. Their children grow up to have shoe sizes of 12, 11, 10, 9, 8, 7, and 6.,what inheritance pattern is this?
Definition
polygenic
Term
A single gene controls flower color, however you observe flowers that are red, orange, yellow, pink, and purple, what inheritance pattern is this?
Definition
multiple alleles
Term
A tall giraffe is bred with a short giraffe and all the babies are tall, what inheritance pattern is this?
Definition
complete inheritance
Term
nondisjunction
Definition
when sister chromatids fail to separate during meiosis (anaphase)
Term
What process occurred if a gamete has an extra chromosome or is missing a chromosome?
Definition
nondisjunction
Term
What shape is used to represent women in a pedigree?
Definition
circles
Term
What shape is used to represent men in a pedigree?
Definition
squares
Term
What sex chromosomes do men have?
Definition
XY
Term
What sex chromosomes do women have?
Definition
XX
Term
List 3 diagnostic tools used to help identify/determine genetic disorders
Definition
Karyotype
Pedigree
Amniocentesis
Term
List genetic disorders caused by abnormal chromosome number
Definition
Down's Syndrome (Trisomy 21)
Trisomy 13
Trisomy 18
Klinefelters (XXY)
Turners (X)
Term
List genetic disorders caused by inherited genes:
Definition
Hemophilia
Color blindness
Albinism
Hungtinton's
Achrondroplasia
Male Pattern Baldness
Term
Name two disorders that are due to autosomal dominant genes?
Definition
Huntington's
Achondroplasia (Dwarfism)
Term
Name two disorders that are due to autosomal recessive genes?
Definition
Albinism
Cystic Fibrosis
Term
Name 3 disorders that are inherited due to sex-linked genes
Definition
Color-blindness
Male baldness
Hemophilia
Term
List the two hypotheses proposed for understanding inheritance:
Definition
1. Particulate Hypothesis
2. Blending Hypothesis
Term
List Mendel's two principles:
Definition
1. Principle of Independent Assortment
2. Principle of Segregation
Term
Which of Mendel's principles is not followed when nondisjunction occurs?
Definition
Principle of Segregation
Term
Which of Mendel's principles explains why you can have a child who is blonde with curly hair and a child who is brown with straight hair and a child who is brown with curly hair all from the same two parents?
Definition
Principle of Independent Assortment
Term
Give an example of when the environment might influence the expression of the phenotype:
Definition
Sunbleached hair
Suntanned skin
pH of soil changes the color of flowers on a plant
Term
Which hypothesis is supported by Mendel's research?
Definition
Particulate Hypothesis
Term

[image]

What is this diagram called?

Definition
a pedigree
Term

[image]

Is this trait recessive or dominant?

 

Definition
Recessive
Term

[image]

 

What inheritance pattern(s) do blootypes follow?

Definition
Codominance AND Multiple Alleles
Term

[image]

What is the most likely  inheritance pattern for this flower's color?

Definition
Codominance
Term

[image]

What is the notation for this image?

Definition
47,XY, +21
Term

[image]

What is this diagram called?

Definition
Karyotype
Term

[image]

Is this individual male or female?

Definition
male
Term

[image]

What disorder does this individual have?

Definition

Trisomy 21

AKA

Down's Syndrome

Term
amniocentesis
Definition
a procedure where a needle is inserted into the abdomen and uterus of a pregnant woman to remove cells from the amniotic fluid surrounding a fetus.
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