Please Take Out The Following:PencilScience Journal: Notes PortionChapter 8 Homework Packet*If you have not taken the Chapter 8 Quiz from yesterday, SEE ME NOW!
Answer
Autosomal: Pertaining to a chromosome that is not a sex chromosome.
People normally have 22 pairs of autosomes (44 autosomes) in each cell together with two sex chromosomes (X and Y in the male and XX in the female).
Core & Honors VocabularyBased on the pedigree below, is the disease sex
linked (X-Linked), or autosomal? Why?
Core & Honors Vocabulary
What best describes Huntington’s Disease?
A) Sex-Linked (X-Linked) Dominant
B) Autosomal Recessive
C) Sex-Linked (X-Linked) Recessive
D) Autosomal Dominant
Answer
HUNTINGTON’S DISEASE – A genetic disorder that is caused by an autosomal dominant allele. Every one who inherits the allele develops Huntington’s disease and has a 50% chance of passing it on to offspring. Symptoms do not develop until a person is over 30 (late onset). Death is caused by the gradual breakdown of cells in the brain.
Core & Honors Vocabulary
When alleles for different characteristics are on separate chromosomes, they are distributed to gametes separately. This is known as: ________________________________________
Answer
When alleles for different characteristics are on separate chromosomes, they are distributed to gametes separately. This is known as:
The Law of Independent Assortment
*Mendel's Law of Independent Assortment - The alleles of the many different genes present in any given
(diploid) organism segregate/assort from one another in a random fashion (see dihybrid cross)
Core & Honors VocabularyWhat is it called where an allele of a gene
separates from each other during meiosis?
AnswerWhat is it called where an allele of a gene separates from each other during meiosis?
Mendel’s Law of Segregation
Core & Honors VocabularyWhen two alleles for a gene cause a blended
phenotype, this is called: ___________________
VocabularyWhen one allele/genes affects multiple traits on the
phenotype, it is called: ____________________
AnswerWhen one allele/genes affects multiple traits
on the phenotype, it is called: Pleiotropy
Pleiotropy – the ability of one gene to affect an organism in many ways.
Core & Honors VocabularyWhen multiple pairs of genes determine a trait, it is
called: __________________________________
Core & Honors VocabularyWhen two different alleles for a trait are both
expressed, it is called: ________________
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