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The Human Genome A Review. Dr. Howell Biology I Blacksburg High School. Look at diagram A below. What process is represented?. Meiosis. Look at diagrams B and C below. What is this called?. Nondisjunction. How many TOTAL chromosomes does a human have?. 46. - PowerPoint PPT Presentation
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The Human Genome
A Review
Dr. Howell
Biology I
Blacksburg High School
Look at diagram A below. What process is represented?
Meiosis
Look at diagrams B and C below. What is this called?
Nondisjunction
How many TOTAL chromosomes does a human have?
46
How many AUTOSOMES does a human have total?
44
How many SEX CHROMOSOMES does a human have?
2
What sex chromosomes does a male have? A female?
XY and XX
What is sickle cell disease?
A blood disease where the body produces an abnormal hemoglobin, causing red blood cells
to form a “sickle” shape.
Turner Syndrome
Klinefelter Syndrome
Down syndrome
Person has 3 #21 chromosomes
Female with only one X chromosome
Match the disease to its chromosomal disorder:
Male with XXY
What sex is the individual in this karyotype?
Male
What is a pedigree?
A chart that traces the inheritance of traits in a family
What does a square represent?
What does a circle represent?
What does a shaded shape mean?
What does a horizontal line between two people mean?
What does a vertical line coming off of married people mean?
The children
The person has the disease
A male
A female
The are married
In a pedigree:
What is/are the possible genotype(s) of individual # 3 below?
Ff
What is the possible genotype(s) of individual #12 below:
Either FF or Ff
A.
B.
C.
D.
E.
An autosomal recessive disorder means that the affected individuals will have what genotype?
Could have any of the genotypes
Either FF or Ff
FF
Ff
ff
A.
B.
C.
D.
E.
What genotype(s) does an individual with an autosomal dominant disease have?
Could have any of these genotypes
PP
pp
Pp
Either PP or Pp
What is (are) the possible genotype(s) of individual #2?
Pp
What is (are) the possible genotype(s) of individual #7?
pp
Which chromosome are most sex-linked genes found?
X chromosome
What sex – male or female – is most affected by sex-linked genes?
Male because he only has one X chromosome, so anything
on it will be expressed.
What is gene therapy?
The process of attempting to cure genetic disorders by placing copies of healthy genes
into cells that lack them.
What are polygenic traits?
Ones that are controlled by more than one gene, such as skin color.
What disease does this karyotype indicate?
Klinefelter Syndrome
What disease does this karyotype indicate?
Down Syndrome
What disease does this karyotype indicate?
Turner Syndrome
What are some uses for DNA fingerprinting?
• Trace ancestry• Match evidence/suspects at
crime scene• Figuring out paternity
Who committed the crime?
John