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Chapter 5 Heredity. Pages 125-143. Genetics terminology. Traits – things that you inherit from your parents Heredity – the passing of traits from parents to offspring Genetics- the study of how the traits are inherited Probability- the chance that something will take place (odds). - PowerPoint PPT Presentation
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Chapter 5 Heredity
Pages 125-143
Genetics terminology
Traits – things that you inherit from your parents
Heredity – the passing of traits from parents to offspring
Genetics- the study of how the traits are inherited
Probability- the chance that something will take place (odds)
The code for traits is carried on chromosomes
This code is called the genotype. The result of the code is called the phenotype Tongue Rolling example
Genotype can be Heterozygous Homozygous
Vocab we all need to know…
Dominant Trait– Recessive Trait- Heterozygous- Homozygous- Genotype- Phenotype
Pompe Disease
It is a recessive disease.
The Punnett Square
1. Traits
2. Parents
Punnett Square
Genotypes and %
Phenotypes and %
Mice and Fur Problem
Gregor Mendel – The father of genetics
Worked with pea plants (30,000 total) Found out that some traits were dominant
and some recessive
Mendel’s Laws of Heredity
1. Traits are controlled by alleles on chromosomes.
2. Alleles can be dominant or recessive. 3. During meiosis the chromosomes that
carry the two forms of the allele go into separate sex cells (gametes).
Punnett Square
Fruit Fly Lab
Genetics News
Punnett Square Practice
1a. BB x bb
Problem 1b.
Bb x Bb
Problem 2a Yy x Yy
Problem 2b Yy x yy
Conclusion….
According to my to hypothesis our prediction of male to female should have 1:1. Our data was close, for example
Incomplete Dominance
When you have two alleles and both are dominant.
Sex Linked Traits
Traits that associated with being male or female
Hemophilia
How to do a punnett square for sex-linked traits. In humans colorblindness is a sex-linked
recessive trait. Show the possible children of a female carrier and a normal male.
ATB-In mice having fur is a dominant trait, what can you say about the genotype of this creature?
Fly lab 2
Punnett Square Problems
Lemming Lab
http://www2.edc.org/weblabs/Punnett/punnettsquares.html
Problem 2
Problem 3 Fly Packet Dihybrid cross
Fly Lab # 3 Dihybrid Cross Predictions for Phenotypes
Orange & Round = 56.25% Orange & Bar = 18.75% Black and Round = 18.75% Black and Bar = 6.25%
Lab
Four different colors of dice Female
Blue (body color) Yellow (eye shape)
Male White (body color) Black (eye shape)
Human Sex Determination
Human Chromosomes Hemophilia a sex linked disease
Fly packet conclusions due Wednesday…. For each give a purpose statement saying
what was the lab about. Type your conclusion
Colorblindness is a sex-linked disease, show the offspring of a female carrier and a male with the disease.
color vision test
Incomplete Dominance
In some flowers white and red flowers have incomplete dominance. What types of offspring could a red and white flower have?
Polygenic Inheritance
When many genes contribute to a trait. It produces a wide variety of results in the
phenotype. Hair color, eye color, height, weight,
Blood Type
3 genes determine blood type,A, B, O You only get 2 at a time A and B are “co-dominant” O recessive blood type
Portfolios Due Tuesday
50-50 chances lab Coin flip lab Lemming lab Punnett square ws Punnett square quiz Biologica (dragon) Punnett sq. review crossword
Pea pod lab Polygenic lab (height) Green pepper lab Fly packet Inherited traits (face) Fly conclusions Chapter rev NTWS
Make your own color blindness test
Blood Type
Multiple alleles Co-dominance Blood Type Gene Possiblities
Chart of Blood Types
Blood Type Antigens on the blood cell
Antibodies in blood
A A B
B B A
AB Both AB None
O None AB
Universal Donor – can give blood to anyone Type O
Universal Recipient – can get blood from anynone Type AB
ATB
Could a man who is type AB blood have a child who is type O?
Could a man who is type A blood have a child who is type O?
Vocab List for the Quest
Heredity Alleles Genetics Dominant Recessive Genotype Phenotype Homozygous Heterozygous Co-Dominance(incomplete Dominance) Polygenic Inheritance Sex-linked traits Pedigree