thompsonbiology.weebly.comthompsonbiology.weebly.com/.../guided_notes_11.1.docx · web viewhonors...

Honors Biology Guided Notes- Chapter 11 Section 1 RECESSIVE GENETIC DISORDERS Many human conditions are called complex characters because they are greatly influenced by both genetics and the environment. Recessive traits can only be expressed when the individual is ________________________ for that trait – Individuals that are heterozygous for a trait are called ________________ – Examples of Recessive Disorders Disorder Occurrence In US Cause Effect Treatment Tay-Sachs Buildup of fatty deposits in the brain, mental disabilities Albinism Genes do not produce normal amounts of pigment melanin 1 in 3500 No cure, daily cleaning of mucus from lungs, mucus thinning drugs, pancreatic enzyme supplements Absence of gene that codes for enzyme that breaks down galactose DOMINANT GENETIC DISORDERS Not all disorders are caused by ________________ alleles, some disorders are cause by _____________ – those without a disorder are ____________________ recessive – Examples of Recessive Disorders Disorder Occurrence in Cause Effect Treatment

Upload: duongcong

Post on 29-Jun-2018

212 views

Category:

Documents

0 download

Report

Download

Embed Size (px):

TRANSCRIPT

Honors Biology Guided Notes- Chapter 11 Section 1

RECESSIVE GENETIC DISORDERSMany human conditions are called complex characters because they are greatly influenced by both genetics and the environment. Recessive traits can only be expressed when the individual is ________________________ for that trait

– Individuals that are heterozygous for a trait are called ________________– Examples of Recessive Disorders

Disorder Occurrence In US Cause Effect TreatmentTay-Sachs Buildup of fatty

deposits in the brain, mental disabilities

Albinism Genes do not produce normal amounts of pigment melanin

1 in 3500 No cure, daily cleaning of mucus from lungs, mucus thinning drugs, pancreatic enzyme supplements

Absence of gene that codes for enzyme that breaks down galactose

DOMINANT GENETIC DISORDERSNot all disorders are caused by ________________ alleles, some disorders are cause by _____________

– those without a disorder are ____________________ recessive– Examples of Recessive Disorders

Disorder Occurrence in the US

Cause Effect Treatment

Achondroplasia Short arms and legs, large head

1 in 10,000 No cure or treatment

Page 2: thompsonbiology.weebly.comthompsonbiology.weebly.com/.../guided_notes_11.1.docx · Web viewHonors Biology Guided Notes- Chapter 11 Section 1 RECESSIVE GENETIC DISORDERS Many human

PEDIGREESA technique used to show _______________________________It is a diagram using symbols that traces the ________________ of a particular _______________though several generations

-Interpret the following diagrams:1)Example of Inheritance of a trait

Squares= malesCircles= ___________Colored in shape= has traitNot colored in shape= _______________________________________________________= parents of the offspring belowRoman Numeral= __________________Number= birth order

2) Tay-Sachs

Number of unaffected parents (carriers of recessive allele)= _________________________Affected child is in _________________________- child got both recessive alleles

3) Polydactyl

Polydactyl is a ______________________ disorder that causes ____________________________Offspring ______________ has polydactyl (either heterozygous or homozygous recessive-has to be heterozygous b/c of II)Offspring ______________ does not have polydactyl because neither parent has the trait* We can infer __________________ from the _________________ here in a pedigree from generation to generation

Theoretical Genetics 4.3. 4.3.1 Define genotype, phenotype, dominant allele, recessive allele, recessive allele, codominant alleles, locus, homozygous,

Autosomal Recessive, Autosomal Dominant, and X-linked ...birdmanscience.weebly.com/uploads/5/6/5/7/56574945/disorders... · Autosomal Recessive Autosomal Dominant X-Iinked recessive

BEYOND DOMINANT & RECESSIVE ALLELES

Recessive Inheritance - EuroGentest · Recessive Inheritance The following will give you information about what recessive inheritance means and how recessive conditions are inherited

Harry Potter and the Recessive Allele

Beyond Dominant and Recessive Alleles

Dominant vs. Recessive and Genotype vs. Phenotype Dominant vs. Recessive and Genotype vs. Phenotype

Genetic Diseases Achonddroplasia (Dwarfism) Adrenoleukodystrophy Albinism Autosomal Recessive Polycystic Kidney DiseaseAutosomal Recessive Polycystic Kidney

Molecular Markers. Morphological Markers Recessive in nature Recessive in nature Mutations - deleterious phenotype Mutations - deleterious phenotype Problems

Recessive, Dominant, and Sex-Linked Trait · Recessive, Dominant, and Sex-Linked Trait Recessive, Dominant, ... ·if a parent has a dominant allele, there is a 50/50 chance of passing

Principles of Inheritance and Variation...Select the autosomal dominant, autosomal recessive, X-sex linked recessive and Y-sex linked recessive disorders respectively (A) Myotonic

Complex Inheritance. Simple Recessive Heredity Most genetic disorders are caused by recessive alleles; the person must be homozygous recessive in order