• 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
Vocabulary Review 7
Vocabulary Review 7

... 2. Is incomplete dominance like a glass of cranberry-raspberry juice or a pizza with ...
Genetics - Elizabeth Rose Greenman
Genetics - Elizabeth Rose Greenman

... • When he crossed the F1 generation peas with one another, only some of the offspring had purple flowers. These formed the F2 generation. • Mendel found that in the F2 generation, ¾ of the plants had purple flowers and ¼ of them had white flowers. ...
Slide 1
Slide 1

... selection paper into two columns, and write the heading Trait in one column and would favor if you think about the Advantage in the other. demands of an organism’s environment. 2. Under Trait, write in several of the animal’s traits. ...
Ch. 14 Mendelian Genetics
Ch. 14 Mendelian Genetics

... How will the recessive trait ever be expressed if it is dominated by the other trait? • It can only be expressed when there is no dominant trait present. • He called this genotype homozygous recessive. ...
Genetics_Problems
Genetics_Problems

... 5. The following is an edited version of email exchange that occurred in response to the a human genetics tutorial on a biology website. First message from a concerned grandmother: I am wondering how to find out blood type of my grandson…. My daughter has A blood…. The father is in questions and sh ...
Document
Document

...  genetic disorder in which 7 genes are missing or unexpressed on maternal chromosome 15 due to gene deletion, uniparental disomy, imprinting mutations (methylation)  only maternal copies of genes are expressed (paternally inherited copies of these genes are silent) ...
pedigrees powerpoint 2015
pedigrees powerpoint 2015

... probability of a child having a disorder in a particular family.  To begin to interpret a pedigree, determine if the disease or condition is dominant or recessive. ...
Procedure - Peevyhouse
Procedure - Peevyhouse

... certain forces act on the population. Dominant alleles will not replace recessive alleles, and the ratio of heterozygous and homozygous individuals does not change over the course of several generations. This theory has come to be known as the Hardy-Weinberg principal; it is the basis of the study o ...
Ligand - Nature
Ligand - Nature

... Higher frequency of A genotype KIR genes in Northern Europe. Synthetic maps of Europe showing 2DL3 and AA genotype carrier frequencies (%) are on the left hand side in panels A and B respectively. Geographical coordinates of populations (n=23 for 2DL3 and n=13 for AA gentoypes) are represented by po ...
Jareds. Bio+Final+Review+B+2010
Jareds. Bio+Final+Review+B+2010

... 1. Question: What is heredity? What is the study of heredity known as? Answer: a. Biological inheritance of trait from parent to off spring. b. Today, the study of heredity is known as genetics. 2. Question: How do organisms inherit traits? Answer: When an organism receives two different alleles for ...
Keystone Review For Module 2
Keystone Review For Module 2

... A. Correct – genetically modified plants may spread their genes to wild plants during pollination, which cannot be controlled in the outdoor environment. This may result in genes for resistance being spread into ecosystems, causing unintended results. B. Incorrect – this type of genetic engineering ...
Microsoft Word - worksheet punnett square review 2010
Microsoft Word - worksheet punnett square review 2010

... is roan colored (contains both red hair and white hair) a. Cross a red cow and a white cow. What would be the genotypic and phenotypic ratios of the offspring be? b. Would it be possible to have any red cattle when two roan cattle are crossed? Show punnett square to support your answer. 9. In Guinea ...
Human Heredity and Sex
Human Heredity and Sex

... Types of Sex-linked Disorders 1. Colorblindness – sex-linked disorder in which an individual can’t perceive certain colors. It is passed to offspring on the X chromosome. -If an X carries the recessive allele for colorblindness it may or may not be expressed in a female but will be expressed in a m ...
Identification of the 5T‐12TG allele of the cystic fibrosis
Identification of the 5T‐12TG allele of the cystic fibrosis

... disease in adulthood. However, the risk of exposing individuals to unnecessary intervention must be taken into account. On the other hand, only further clinical follow-up of these subjects will be able to define how many of them will go on to develop a CF phenotype. In conclusion, we identified a fu ...
Is the Human Organism Predisposed to Addictive
Is the Human Organism Predisposed to Addictive

... color), classical genetics uses phenotypes to deduce the functions of genes. By using breeding experiments, early genetics pioneers could check these inferences and were able to trace inheritance patterns with limited knowledge of molecular biology and make assumptions about the transference of vari ...
P1 Genotype - misskuenneth
P1 Genotype - misskuenneth

... F1: % of having a child which is normal _____ % of having a child who is colorblind _____ % of the F1 generation that are: normal vision males: _____ Color blind males: _____ Normal vision females _____ Color blind females _____ 3. A color-blind female marries a normal vision male. Key: P1 Genotypes ...
How Genes and Genomes Evolve
How Genes and Genomes Evolve

... plants was determined by the genotype (actual combination of alleles) ...
Monohybrid Practice Problems Show Punnett Square, give
Monohybrid Practice Problems Show Punnett Square, give

... For each of the following complete a Punnett square and answer the question using your own paper. 1. A tall plant of unknown genotype is test-crossed (meaning it is crossed with a recessive tt plant). Of the offspring, 869 are dwarf and 912 are tall. What is the genotype of the unknown parent, is it ...
Dragon Genetics Exploration
Dragon Genetics Exploration

... Name: _____________________________________________ ...
Chapter 3
Chapter 3

... each particular gene can vary, although usually they do not. Some genes have alternate versions of base pairs, with transpositions, deletions, or repetitions of base pairs not found in other versions of the same gene. Each of these variations is called an allele of that gene. Most alleles cause only ...
EEB 122b FIRST MIDTERM
EEB 122b FIRST MIDTERM

... mutation in the cystic fibrosis transmembrane conductance regulator (CFTR) gene. Such individuals suffer from severe lung damage over time. For people of European ancestry, the frequency of CF-causing alleles in the population is .02. In some populations, up to 4% of individuals are heterozygous car ...
Chapter 3 Mendelism: The Basic Principles of Inheritance
Chapter 3 Mendelism: The Basic Principles of Inheritance

... genes segregate,(assort) independently of each other (The traits in the offspring of this crosses did not always match the combinations of traits in the parental organisms). In humans, diploid cells contain 46 chromosomes, 23 female chromosomes 23 male chromosomes During meiosis, the pairs of simila ...
Chapter 14: Mendel and the Gene Idea
Chapter 14: Mendel and the Gene Idea

... As you start to work word problems in genetics, two things are critical: the parent’s genotype must be correct, and the gametes must be formed correctly. Using Figure 14.8 as your guide, explain how the gametes are derived for the following cross. (You should have four different ...
Name - PSUSDscienceresources
Name - PSUSDscienceresources

... 21. Meiosis and mitosis are the two major types of cell division in organisms that reproduce sexually. Which of the following is a major difference between meiosis and mitosis? A meiosis results in half the number of cells, mitosis results in double the number of cells B meiosis occurs in prokaryot ...
Polygenic Inheritance
Polygenic Inheritance

... II  Principle:  While  the  rules  of  Mendelian  inheritance  hold  true  for  many  situations  it  does  not   explain  them  all.    Polygenic  Inheritance  is  a  term  used  to  describe  cases  where  many  genes   contribute   ...
< 1 ... 182 183 184 185 186 187 188 189 190 ... 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