Transcript Mendelian Genetics

Mendelian Genetic
• SC.912.L.16.1
– Analyze pattern of inheritance using Mendel’s Law of
segregation and independent assortment
• SC.912.L.16.2
– Identify, analyze, and/or predict traits caused by various
modes of inheritance, including:
• Dominant, incomplete dominance, recessive, co-dominant, sexlinked, polygenic, multiple alleles
– Predict the genotype and phenotype of the P1 and F1
generations using Punnett squares and pedigree diagrams
– Construct a dihybrid cross that results in the ratio of 9:3:3:1
https://www.youtube.com/watch?v=Mehz7tCxjSE
How do the laws of segregation and
independent assortment affect the
analysis of inheritance patterns?
• Traits are inherited
independently of one another.
– Ex: Just because you have blonde
hair does not mean you will have
blue eyes.
Dominant vs Recessive
• Dominant allele is allele that is expressed
when two different alleles or two dominant
alleles are present (upper case letter= A)
• Recessive allele is allele that is only expressed
when two copies are present (lower case
letter=a)
How does the mode of inheritance (dominance, codominance, etc.) affect the prediction and analysis of
inheritance patterns?
RrYy
Phenotypic Ratio= 9:3:3:1
Biotechnology
SC.912.L.16.10
• evaluate the possible impact of biotechnology on the
individual, society, and the environment, including
medical and ethical issues, such as:
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karyotyping
DNA fingerprinting
cloning
gene therapy
genetically modified foods and artificial selection
• analyze how heredity and family history can impact
personal health
Karyotype
-describes the number of chromosomes and what they look
like under a microscope
-can be used to study chromosomal abnormalities, disorders,
evolutionary relationships among species, etc…
DNA Fingerprinting
-procedure where the genetic information in a
person's cells is analyzed and identified
-no two person's genetic code is exactly the
same which makes DNA fingerprinting a very
useful tool for our modern society.
It can be used to:
Determine Family Relationship
Detect Inherited Diseases
Prove Guilt or Innocence
Identify a Dead Body
Gene Therapy
-experimental technique that uses genes to treat or
prevent disease
Recombinant DNA
-DNA made from 2 or more different organisms
Genetically Modified Foods
-creating “herbicide resistant” crops (kill weeds, not
crops)
-drought resistant crops
-“healthier” food infused with vitamins
Pedigrees Analysis
https://www.youtube.com/watch?v=Wuk0W10EveU
Do you really understand this?
Mendel hypothesized that reproductive cells have only one factor for each
inherited trait. This hypothesis is supported by which observation?
A. Haploid cells are produced by mitosis.
B. Diploid cells are produced by mitosis.
C. Haploid cells are produced by meiosis.
D. Diploid cells are produced by meiosis.
A human baby boy inherits a recessive allele from his mother. In which
circumstance would he most likely show the trait coded for by the recessive
allele?
A. The baby inherits the dominant allele from his father.
B. The allele is on an autosomal chromosome and the baby is a twin.
C. The allele is on the X chromosome.
D. The allele is on the Y chromosome.
This diagram shows a diploid cell with two pairs
of homologous chromosomes.
Due to independent assortment, what is the
possible genetic make-up of gametes produced
by this organism?
A. SsTt
B. Ss, Tt
C. S, s, T, t
D. ST, St, sT, st
This diagram shows a pedigree for a recessive genetic disorder.
What is the genotype of individual 6?
A. XHXH
B. XHXh
C. XHY
D. XhY
The way that crimes are solved today was
affected by which of the following
technologies?
A. gene therapy
B. DNA fingerprinting
C. genetic testing
D. Genetic modification