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Chapter 9 - Advanced Biology
Chapter 9 - Advanced Biology

...  Creates new combinations of genes that have never existed before  The chromosomes in you from your mom and dad get mixed up together  So, the chromosome you pass on to your kid will be a blend of their grandparents’ ...
Answered copy of exam 3 (white)
Answered copy of exam 3 (white)

... is a recessive genetic disease that can be detected in utero only with DNA-based tests. Is a disease that can be detected in utero using an enzyme assay. is a relatively safe procedure that provides fetal cells and byproducts 15-16 weeks into a pregnancy. Is a non-genetic condition that can be detec ...
Genetics - TeacherWeb
Genetics - TeacherWeb

...  Sex Influenced Condition: not sex linked; not attached to the X chromosome; patterned baldness (influenced by female hormones) ...
Mutations-Powerpoint
Mutations-Powerpoint

... chromosome is lost ...
Mutation PPT
Mutation PPT

... • Trisomy 21 Down syndrome – Mental retardation and characteristic physical features ...
Genetic Disorders Class Notes
Genetic Disorders Class Notes

... Huntington’s Disease (HD): Wasting away of brain tissue, causes uncontrolled movements, emotional disturbances, mental deterioration, fatal (8:100,000) ...
Document
Document

... conditions that are passed down from parent to offspring •POLYGENIC are traits that are influenced by multiple genes rather than a single allele •COMPLEX CHARACTERS- human conditions that are influenced by a combination of genes and environmental factors. •Skin color, height, heart disease ...
PowerPoint to accompany - Home Page of Ken Jones
PowerPoint to accompany - Home Page of Ken Jones

... • three alleles of ABO blood typing are IA, IB, I • a person with type A may have the genotype IA i or IA IA • a person with type B may have the genotype IB i or IB IB • a person with type AB must have the genotype IA IB • a person with type O blood must have the genotype ii ...
Use of paper chromosomes: Illustration of meiosis and crossing over
Use of paper chromosomes: Illustration of meiosis and crossing over

... pairs. This represents the events metaphase and anaphase of meiosis I. 9. Finish meiosis I by placing string around the chromosome sets to illustrate the fact you have two cells. Note: you formed two cells but note that you don’t reform a nuclear membrane. You should have one doubled chromosome in e ...
Variation
Variation

... Chemicals mustard gas, nitrous oxides / acids (c) Antibiotics act as selective agents (d) For insects, mutation rate is doubled by a 10ºC rise in temperature. Some mutation enables the species to adapt to the new environments. The presence of mutant characteristics can be related to a change in the ...
Genetic Mutation Worksheet - Westgate Mennonite Collegiate
Genetic Mutation Worksheet - Westgate Mennonite Collegiate

... “point mutations”, because a single base is changed, at one point in the gene. SOMETIMES, these base (A,T,C,G) substitutions lead to “Missense” or “Nonsense” mutations: ...
You Light Up My Life
You Light Up My Life

... • All cells have same genes • One of the cells is removed and its genes analyzed • If cell has no defects, the embryo is implanted in uterus ...
MENDELIAN INHERITANCE
MENDELIAN INHERITANCE

... chromosome as original, creating mosaic individual ...
Section 7.1 Chromosomes and Phenotype Relate dominant
Section 7.1 Chromosomes and Phenotype Relate dominant

... they do not directly affect sex determination. Gene expression can differ depending on the type of chromosome on which a gene is located. ...
Mendelian Genetics Activity Reference Sheet
Mendelian Genetics Activity Reference Sheet

... One of one or more possible forms of a gene, each affecting the inherited trait somewhat differently. Autosomal: Of or relating to any chromosome other than the sex chromosomes; a characteristic inherited on any gene pair other than the sex chromosomes. Chromosome Pair (Homologous pair): A pair of c ...
Independent Assortment Mendel wanted to figure out if traits are
Independent Assortment Mendel wanted to figure out if traits are

... Law: When gametes are formed, the  alleles of a gene for one trait segregate  independently of the alleles of a gene for  another trait. ...
Section Objectives
Section Objectives

... • The mutation may produce a new trait or it may result in a protein that does not work correctly. Sometimes, it is nonfunctional, and the embryo may not survive. ...
Chromosomal mutations
Chromosomal mutations

... Chromosome Structure DNA wrapped around histone proteins forming bead-like units or “nucleosomes” These are coiled forming a “super coil” which coils to form a “chromosome” ...
Satiable Curiosity - Journal of Genetic Genealogy
Satiable Curiosity - Journal of Genetic Genealogy

... estimating the length, but genetic genealogists could furnish them with cases where a gene conversion event occurred in one line of descent. Using a heterozygous sample and DYS385 as an anchor, sequencing could proceed in both directions until a few single nucleotide polymorphisms (SNPs) were encoun ...
MUTATIONS
MUTATIONS

...  A cell only uses some genes; other genes are kept “silent” (turned off).  Sites near the promoter determine if a gene is turned on or off. ...
Patterns of Heredity - Bishop Ireton High School
Patterns of Heredity - Bishop Ireton High School

... neurological disease that appears after age 35-become incapacitated. Loss of muscle and motor control. ...
Nature Rev.Genet. 8
Nature Rev.Genet. 8

... The AS-ICR is nonfunctional in males allowing the PWS-ICR to activate nearby genes The PWS-ICR promotes expression of an antisense Ube3a transcript in males ...
Unit 1 Study Guide
Unit 1 Study Guide

... 25. The formation of a river divides a species of frogs into two groups. How will this affect the frogs? Slowly become genetically different ...
Sample questions - I Exam
Sample questions - I Exam

... contains three pairs of chromosomes. This organism is unusual in that no recombination between homologous chromosomes occurs during meiosis. (a) Assuming that the chromosomes are distributed independently during meiosis, how many different types of sperm or egg cells can a single individual of this ...
Name
Name

... c. colorblindness is rare in females - Males have just one X chromosome. Thus, all Xlinked alleles are expressed in males, even if they are recessive. In order for a recessive allele to be expressed in females, there must be two copies of the allele, one on each of the two X chromosomes. This explai ...
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Skewed X-inactivation

Skewed X chromosome inactivation occurs when the inactivation of one X chromosome is favored over the other, leading to an uneven number of cells with each chromosome inactivated. It is usually defined as one allele being found on the active X chromosome in over 75% of cells, and extreme skewing is when over 90% of cells have inactivated the same X chromosome. It can be caused by primary nonrandom inactivation, either by chance due to a small cell pool or directed by genes, or caused by secondary nonrandom inactivation, which occurs by selection. Most females will have some levels of skewing. It is relatively common in adult females; around 35% of women have skewed ratio over 70:30, and 7% of women have an extreme skewed ratio of over 90:10. This is of medical significance due to the potential for the expression of disease genes present on the X chromosome that are normally not expressed due to random X inactivation. X chromosome inactivation occurs in females to provide dosage compensation between the sexes. If females kept both X chromosomes active they would have twice the number of active X genes than males, who only have one copy of the X chromosome. At approximately the time of implantation (see Implantation (human embryo), one of the two X chromosomes is randomly selected for inactivation. The cell undergoes transcriptional and epigenetic changes to ensure this inactivation is permanent. All progeny from these initial cells will maintain the inactivation of the same chromosome, resulting in a mosaic pattern of cells in females.
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