Name Date Period Chapter 14 Human Genetics Take notes here Summary – one summary at the end...
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Name Date Perio d Chapter 14 Human Genetics Take notes here Summary – one summary at the end Questio ns “Cornell Style”
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Transcript of Name Date Period Chapter 14 Human Genetics Take notes here Summary – one summary at the end...
NameDatePeriod
Chapter 14
Human Genetics
Take notes here
Summary – one summary at the end
Questions
“Cornell Style”
Pedigree Analysis
Studying a family tree for detection of a trait
pedigree diagram
I
II
1 2 3
generations
birth order
pedigree symbols
= male
= female
= mating
(identical) twins (fraternal) twins
= affected individual
= carrier
Carriers have one recessive allele and can passthe trait without expressing it.
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Sex-linked traits Inherited through genes on the X (or Y)
chromosome
Sex-linked traits
Example:Colorblindness – the most common is
red-green
Sex-linked traits
Example Hemophelia – “bleeders disease”, males 1:10,000, females 1:1,000,000
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Each human body cell has 46 chromosomes.
Sex chromosomes -- determine the sex of an organism.
Humans have 2 sex chromosomesX X = female X Y = male
Autosomes -- all of the other chromosomes Humans have 44
Humans have 2 types of cells: sex and body.
Sex cells are called haploid cells (n). They have 23 chromosomes. They are sperm in males and eggs in females.
Body cells are called Diploid cells (2n). They have 46 chromosomes, 23 from each parent. They make your body.
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Prenatal Diagnosis Amniocentesis – small amount of fluid is removed
from the sac around the embryo A karyotype is then done to ID all the chromosomes in
the nucleus
Write a 3 sentence
summary about the notes.
NOT what you learned or how you feel!
