• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Genetics and Heredity - Fullfrontalanatomy.com
Genetics and Heredity - Fullfrontalanatomy.com

... and yellow paints blend to make green. What would happen if this was the case? ...
Genetics[1] - Turner
Genetics[1] - Turner

... • Sometimes, one trait does not dominate another. Sometimes, both traits will be expressed. There are two types of intermediate traits • Incomplete Dominance-a cross between organisms with two different phenotypes produces offspring with a third phenotype that is a blending of the parental traits. I ...
Genetics Test
Genetics Test

... 16. What phenotype ratio did Mendel discover in a dihybrid cross with all heterozygotes? 17. What is a multiple allele trait? Give an example. 18. What are P, F1, and F2 generations? Problems: 1) Be able to solve and identify problems in dominance, incomplete dominance, codominance (including ABO bl ...
Glucose - St. Bonaventure College and High School
Glucose - St. Bonaventure College and High School

... 1: Dd 6: Dd 10: dd 11: DD/Dd ...
Patterns Of Inheritance
Patterns Of Inheritance

... • A dominant allele masks the recessive allele in the phenotype of an organism. • Geneticists use the capital letter to denote that an allele is dominant and the lowercase letter to denote that an allele is recessive. ...
Genetics
Genetics

... • Codominance is when both alleles for a gene are expressed and both alleles show up in some form. • Examples: 1. When cattle with red hair and cattle of white hair breed, the resulting offspring will have a coat color of roan, a combination of the red hair and the white hair. 2. In a certain fish, ...
Genetics Review
Genetics Review

...  In general, the frequency that crossing over occurs ...
Unit 8 Review B b B BB Bb B Bb bb B bb Bb bb b Bb bb
Unit 8 Review B b B BB Bb B Bb bb B bb Bb bb b Bb bb

... You must be able to read a Punnett square showing a dihybrid cross like the one below. Purple (P) is dominant to Yellow (p) and Smooth texture (S) is dominant to shrunken (s) ...
The Test Cross
The Test Cross

... Nrune ...
Evolution and Natural Selection
Evolution and Natural Selection

... Organisms can be affected by their environment. Variation caused by the environment is not heritable, so it is not subject to natural selection. However, the ability of organisms to develop differently in different environments can be genetic. This means organisms can evolve to be flexible. Plants a ...
Biology Passage 2 - HCC Learning Web
Biology Passage 2 - HCC Learning Web

... 2. heterozygous: Rr - 2 different alleles (dom and rec) at a locus 3. homozygous recessive: rr - 2 identical recessive alleles at locus b. Can not tell the genotype from the phenotype (exactly) Homozygous dominant and heterozygous have same phenotype 4. Non-Classical Dominance: a. Complicated patter ...
chapter 14 - Dublin City Schools
chapter 14 - Dublin City Schools

... that are heterozygous for all three traits, the expected proportion of the offspring that would be: a. homozygous recessive for two specific traits and heterozygous for the third 5. Explain why it was important that Mendel used large sample sizes in his studies. 14.3 Extending Mendelian Genetics 6. ...
Answer Key Biology 1 Exam 3 Spring 2016
Answer Key Biology 1 Exam 3 Spring 2016

... A) crossing over B) random fertilization C) independent assortment D) all of the above 15) Hemophilia has X-linked recessive inheritance. A woman carrier has children with a man without hemophilia. What is the chance that their children will have hemophilia? A) None of females and half of the males ...
Document
Document

... on before they know they have it ...
Answer Key Biology 1 Exam 3 Spring 2016
Answer Key Biology 1 Exam 3 Spring 2016

... A) crossing over B) random fertilization C) independent assortment D) all of the above 15) Hemophilia has X-linked recessive inheritance. A woman carrier has children with a man without hemophilia. What is the chance that their children will have hemophilia? A) None of females and half of the males ...
Inheritance and Genetic Diseases
Inheritance and Genetic Diseases

... Female chromosome(X) never swops info with male chromosome (Y) o Therefore info pertaining to sex including traits of that sex is inherited by offspring as a complete set of info Y dominant over X, therefore all males carry XY all females carry XX This means father determines sex as mother donates X ...
Genetics
Genetics

... certain substances is also genetically controlled. For example, there is a substance called phenylthiocarbamate (PTC for short), which some people can taste (the dominant trait), while others cannot (the recessive trait). A woman who is both a homozygous tongue-roller and a non-PTC-taster marries a ...
Genetics - WordPress.com
Genetics - WordPress.com

... certain substances is also genetically controlled. For example, there is a substance called phenylthiocarbamate (PTC for short), which some people can taste (the dominant trait), while others cannot (the recessive trait). A woman who is both a homozygous tongue-roller and a non-PTC-taster marries a ...
probability & genetics
probability & genetics

... – B- gene for black feathers, W- gene for white feathers: – BB- black, WW- white, BW- “erminette” Black and White! ...
GENETICS REVIEW GUIDE (complete and turn in day of test for
GENETICS REVIEW GUIDE (complete and turn in day of test for

... unborn children? How can this be prevented or treated? ...
Genetics
Genetics

... DNA Fingerprinting is a procedure whereby the genetic information, called DNA, in a person's cells is analyzed and identified. The word fingerprinting is used because, just like a fingerprint, no two person's genetic code is exactly the same. It can be used to: – Determine Family Relationship - DNA ...
gene linkage probs
gene linkage probs

... Chapter 12.2 - Gene Linkage Different alleles exist because any gene is subject to mutation Wild type is a term used for the most common allele in the population. (+) Other alleles, often called mutant alleles, may produce a different phenotype An alternate form of designating alleles. Alleles that ...
Ch 23 Evolution of Populations
Ch 23 Evolution of Populations

... • Mutations may be random or induced by the environment. The ONLY source of new genes and NEW alleles. • Deletions, duplications or rearrangements of many loci are usually harmful. • Point mutations may or may not change an amino acid/protein. • Duplications within ONE gene provide a large variation ...
Document
Document

Biology Chapter 10 Review
Biology Chapter 10 Review

... 17. Be familiar with the “Exceptions” to Mendel’s Rules. (Why are they exception?) 18. Be able to conduct Punnett Square crosses involving exceptions to Mendel’s Rules. 19. Why are some alleles written as a letter/symbol as an exponent on a base letter? 20. What is unique about a heterozygous indivi ...
< 1 ... 537 538 539 540 541 542 543 544 545 ... 619 >

Dominance (genetics)



Dominance in genetics is a relationship between alleles of one gene, in which the effect on phenotype of one allele masks the contribution of a second allele at the same locus. The first allele is dominant and the second allele is recessive. For genes on an autosome (any chromosome other than a sex chromosome), the alleles and their associated traits are autosomal dominant or autosomal recessive. Dominance is a key concept in Mendelian inheritance and classical genetics. Often the dominant allele codes for a functional protein whereas the recessive allele does not.A classic example of dominance is the inheritance of seed shape, for example a pea shape in peas. Peas may be round, associated with allele R or wrinkled, associated with allele r. In this case, three combinations of alleles (genotypes) are possible: RR, Rr, and rr. The RR individuals have round peas and the rr individuals have wrinkled peas. In Rr individuals the R allele masks the presence of the r allele, so these individuals also have round peas. Thus, allele R is dominant to allele r, and allele r is recessive to allele R. This use of upper case letters for dominant alleles and lower caseones for recessive alleles is a widely followed convention.More generally, where a gene exists in two allelic versions (designated A and a), three combinations of alleles are possible: AA, Aa, and aa. If AA and aa individuals (homozygotes) show different forms of some trait (phenotypes), and Aa individuals (heterozygotes) show the same phenotype as AA individuals, then allele A is said to dominate or be dominant to or show dominance to allele a, and a is said to be recessive to A.Dominance is not inherent to an allele. It is a relationship between alleles; one allele can be dominant over a second allele, recessive to a third allele, and codominant to a fourth. Also, an allele may be dominant for a particular aspect of phenotype but not for other aspects influenced by the same gene. Dominance differs from epistasis, a relationship in which an allele of one gene affects the expression of another allele at a different gene.
  • studyres.com © 2026
  • DMCA
  • Privacy
  • Terms
  • Report