New User Special Price Expires in

Let's log you in.

Sign in with Facebook


Don't have a StudySoup account? Create one here!


Create a StudySoup account

Be part of our community, it's free to join!

Sign up with Facebook


Create your account
By creating an account you agree to StudySoup's terms and conditions and privacy policy

Already have a StudySoup account? Login here

Genetics Ch 3 9/2 - 9/4

by: Cherith Notetaker

Genetics Ch 3 9/2 - 9/4 BIOL 3721 - 01

Cherith Notetaker
GPA 3.0
David K Asch, Chester R Cooper & Heather Elizabeth Lorimer

Almost Ready


These notes were just uploaded, and will be ready to view shortly.

Purchase these notes here, or revisit this page.

Either way, we'll remind you when they're ready :)

Preview These Notes for FREE

Get a free preview of these Notes, just enter your email below.

Unlock Preview
Unlock Preview

Preview these materials now for free

Why put in your email? Get access to more of this material and other relevant free materials for your school

View Preview

About this Document

Outline style covering definitions and examples given during class and from the text.
David K Asch, Chester R Cooper & Heather Elizabeth Lorimer
Class Notes
25 ?




Popular in Genetics

Popular in Biology

This 4 page Class Notes was uploaded by Cherith Notetaker on Saturday September 5, 2015. The Class Notes belongs to BIOL 3721 - 01 at Youngstown State University taught by David K Asch, Chester R Cooper & Heather Elizabeth Lorimer in Fall 2015. Since its upload, it has received 59 views. For similar materials see Genetics in Biology at Youngstown State University.


Reviews for Genetics Ch 3 9/2 - 9/4


Report this Material


What is Karma?


Karma is the currency of StudySoup.

You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!

Date Created: 09/05/15
Genetics Ch 3 92 94 gt Dominance O Incomplete Dominance is characterized by F1 progeny that express an intermediate phenotype that is distinct from either purebreeding parent I these heterozygous F1 progeny produce offspring that are of 121 phenotypic ratio I 12 Will be intermediate IA Will be homozygous dominant 14 Will be homozygous recessive I the phenotypes re ect genotypes I the biochemical explanation for incomplete dominance is the individual alleles of a gene have an alternative protein Which has an enzyme that in uences pigment production I this enzyme Will be present in the alleles of one trait in a cross but absent in the other I a heterozygote Will have only enough of the pigment enzyme from the one allele to produce the intermediate trait O Codominance is characterized by F1 hybrids expressing traits from purebreeding parents in equal amounts I e g spotted and dotter lentils producing offspring with spots and dots I cross of the F1 produces offspring with a 121 phenotype ratio 0 a dominance series describes a pattern of dominance ranging from most dominant to most recessive gt Multiple Alleles 0 though there may be more than two alleles in a series Mendel s law of segregation still holds true because individuals only carry no more than two alleles for each gene as alleles separate during gamete formation gt Blood Type Alleles 0 AB blood type individuals have red blood cells RBC that are heterozygous IAIB and codominant I they have both A and B sugar polymers on the surface of their RBC thus they do not make antibodies against A or B blood 0 individuals who are A B or O can be heterozygous in the case of A and B ie IAi IBi or homozygous ie IAIA IBIB ii though 0 can only be expressed as a homozygote ii 0 alleles are not inherently dominant or recessive they are relatively dominant or recessive I dominantrecessive is unique to that allele pair 0 Ex IAi produce Type A making IA completely dominant to I but IAIB produce Type AB making IA codominant to IB 0 these dominant relations are responsible for the six possible blood type genotypes gt Mutations 0 Multiple alleles arise due to mutations or alterations in genetic material I the following gene transmission is possible due to mutation I one example of a mutant allele can be found in the agouti gene which is responsible for the coat pattern present in house mice I the wildtype alleles of the agouti gene exist as bands of yellow and black fur that blend together and give the mouse the appearance of a grey coat I wildtype describes alleles that are present in more than 1 of the population I one common allele monomorphic I multiple common alleles polymorphic gt Lethality O Recessive Lethality allele results in the death of the homozygote I Ex in the gene for yellow mice AY one copy of the gene would produce an offspring with a yellow coat but two copies of the gene would result in the prenatal death of the individual 0 Delayed Lethality death of an individual later in life due to a genetic defect gt Conditional Alleles alleles that are expressed or not expressed under certain environmental conditions 0 Conditional Lethality allele that can be lethal under certain conditions I can be effective after birth I Permissive Conditions range of conditions that permit survival I Restrictive Conditions conditions that negatively impact survival Penetrance number of individuals that have a certain genotype and express the expected genotype 0 PartialReduced Penetrance individuals with the mutated gene who do not exhibit symptoms express partialreduced penetrance Pleiotropy when a single genes determines multiple distinct and seemingly unrelated characteristics 0 Ex sicklecell allele that affects hemoglobin in RBC also prevents the sufferer from contracting malaria I the malaria virus can multiply in normal RBC sickled cells break down before the virus can multiply Expressivity degree of expression of a phenotype in regard to a particular genotype 0 Variable Expressivity range of expression among different individuals with the same genetic condition Epistatic Interactions gene masking the alleles of one gene masking the effects of the alleles of another gene 0 Dominant Epistasis one gene s dominant allele masks the effects of the allele of another gene I Ex the color of summer squash B white A green 0 Recessive Epistasis phenotype of the recessive allele masks the effects of the genotype I Ex the coat of colors Labrador Retrievers B black bb chocolate brown ee yellow 0 the presence of ee in combination with black or brown alleles produces a yellow Labrador I Ex individuals with the rare blood type phenomenon the Bombay phenotype have genotype hh in which case they do not produce substance H the sugar polymer that binds to polysaccharides A and B 0 genotype hh with any of the blood type alleles produces an individual who appears to be type 0 I evidence of recessive epistasis is the 934 ratio in the F2 generation between the cross BBEE black X bbee white gt Complementation Test determines whether a trait arises from a mutation or occurs naturally 1 2 3 tested when seemingly recessive phenotype appears in two different breeding lines proves that mutation affects two different genes and that one parent s normal allele can produce the trait that the other parent s mutant allele cannot one affected individual from both lines is crossed with the other I if offspring have a mutation from each parent and express the wildtype then complementation has occurred gt Gene Interactions of Multifactorial Traits 1 2 3 4 5 gene interaction can produce novel phenotypes dominant alleles from two different genes can be necessary to produce a normal phenotype alleles of one gene can mask the effect of alleles of another gene redundant alleles can be masked by dominant alleles of another gene to produce the normal phenotype mutations of alleles from different genes can be produced by the same phenotype


Buy Material

Are you sure you want to buy this material for

25 Karma

Buy Material

BOOM! Enjoy Your Free Notes!

We've added these Notes to your profile, click here to view them now.


You're already Subscribed!

Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'

Why people love StudySoup

Jim McGreen Ohio University

"Knowing I can count on the Elite Notetaker in my class allows me to focus on what the professor is saying instead of just scribbling notes the whole time and falling behind."

Amaris Trozzo George Washington University

"I made $350 in just two days after posting my first study guide."

Bentley McCaw University of Florida

"I was shooting for a perfect 4.0 GPA this semester. Having StudySoup as a study aid was critical to helping me achieve my goal...and I nailed it!"


"Their 'Elite Notetakers' are making over $1,200/month in sales by creating high quality content that helps their classmates in a time of need."

Become an Elite Notetaker and start selling your notes online!

Refund Policy


All subscriptions to StudySoup are paid in full at the time of subscribing. To change your credit card information or to cancel your subscription, go to "Edit Settings". All credit card information will be available there. If you should decide to cancel your subscription, it will continue to be valid until the next payment period, as all payments for the current period were made in advance. For special circumstances, please email


StudySoup has more than 1 million course-specific study resources to help students study smarter. If you’re having trouble finding what you’re looking for, our customer support team can help you find what you need! Feel free to contact them here:

Recurring Subscriptions: If you have canceled your recurring subscription on the day of renewal and have not downloaded any documents, you may request a refund by submitting an email to

Satisfaction Guarantee: If you’re not satisfied with your subscription, you can contact us for further help. Contact must be made within 3 business days of your subscription purchase and your refund request will be subject for review.

Please Note: Refunds can never be provided more than 30 days after the initial purchase date regardless of your activity on the site.