INTRO LECTURE GENETICS
... •Homozygous: An organism with two alike alleles. •Homo. Dominant •2 Capital letters •Ex. ZZ, BB, FF •Homozygous Recessive •2 lower case letters •Ex. tt, bb, gg •Heterozygous: An organism with two different alleles for a trait. •Heterozygous Dominant: One capital letter and one lower case •Ex. Gg, Hh ...
... •Homozygous: An organism with two alike alleles. •Homo. Dominant •2 Capital letters •Ex. ZZ, BB, FF •Homozygous Recessive •2 lower case letters •Ex. tt, bb, gg •Heterozygous: An organism with two different alleles for a trait. •Heterozygous Dominant: One capital letter and one lower case •Ex. Gg, Hh ...
Study Guide Ch 5.1
... dominant allele. It can have one of these genotypes: homozygous dominant (RR) or heterozygous for the trait (Rr). A plant with wrinkled seeds can only be homozygous recessive (rr). ...
... dominant allele. It can have one of these genotypes: homozygous dominant (RR) or heterozygous for the trait (Rr). A plant with wrinkled seeds can only be homozygous recessive (rr). ...
“Genetics Practice Quiz: Crosses and Pedigrees” 1) Define the
... 7) Describe the pattern by which genes for separate traits are inherited. Can some genes for different traits be linked or always inherited together? For example could the gene for hemophilia and AB Blood type be linked or always inherited together? Why or why not? ...
... 7) Describe the pattern by which genes for separate traits are inherited. Can some genes for different traits be linked or always inherited together? For example could the gene for hemophilia and AB Blood type be linked or always inherited together? Why or why not? ...
9 Genetics Vocabulary
... 19. codominance—both alleles are expressed in the heterozygote 20. incomplete dominance—neither allele is expressed; instead, the phenotype of the heterozygote is in between that of the two homozygotes 21. multiple alleles—when there are more than two alleles for a certain gene 22. carrier—another n ...
... 19. codominance—both alleles are expressed in the heterozygote 20. incomplete dominance—neither allele is expressed; instead, the phenotype of the heterozygote is in between that of the two homozygotes 21. multiple alleles—when there are more than two alleles for a certain gene 22. carrier—another n ...
Unit 6 Genetics - centralmountainbiology
... heterozygous individual has a phenotype that differs from those with either homozygous genotype. - Blending of two alleles. ...
... heterozygous individual has a phenotype that differs from those with either homozygous genotype. - Blending of two alleles. ...
11.1. Introducing Gregor Mendel
... were different, offspring would possess traits intermediate between those of parents. • Found to be incorrect by Mendel!! ...
... were different, offspring would possess traits intermediate between those of parents. • Found to be incorrect by Mendel!! ...
frequency
... 1. Define the following terms: Genetic drift: random change in a gene frequency that is caused by a series of chance occurrences that cause an allele to become more or less common in a population Gene pool: a stock of different genes in an interbreeding population Genetic equilibrium: situatio ...
... 1. Define the following terms: Genetic drift: random change in a gene frequency that is caused by a series of chance occurrences that cause an allele to become more or less common in a population Gene pool: a stock of different genes in an interbreeding population Genetic equilibrium: situatio ...
Punnett Squares & Probability
... Tall or short Genotype: not visible, genetic makeup Homozygous or heterozygous ...
... Tall or short Genotype: not visible, genetic makeup Homozygous or heterozygous ...
handout on genetic nomenclature
... genes or alleles. Gene: single word, begins with upper case letter, at least two characters. An UPPER CASE gene name denotes the wild type form of a gene, or in the case of human, the sequence that is in the human genome database. Allele: Gene suffixed with dash and a numeral, indicating the allele. ...
... genes or alleles. Gene: single word, begins with upper case letter, at least two characters. An UPPER CASE gene name denotes the wild type form of a gene, or in the case of human, the sequence that is in the human genome database. Allele: Gene suffixed with dash and a numeral, indicating the allele. ...
GeneticsPt1.ppt
... • the Law of Segregation • Each organism has two hereditary factors for each trait, which are called ___________. And during meiosis, gamete (egg or sperm) formation, the two factors separate (segregate) into different gametes so that each gamete has only one type of each factor. ...
... • the Law of Segregation • Each organism has two hereditary factors for each trait, which are called ___________. And during meiosis, gamete (egg or sperm) formation, the two factors separate (segregate) into different gametes so that each gamete has only one type of each factor. ...
Term Definition Heredity Passing of traits from parent to offspring
... Allele that is masked when a dominant allele is Recessive allele present; only see when both genes are recessive Organism that has 2 different alleles for a trait; Hybrid organism that is heterozygous for a particular trait Probability ...
... Allele that is masked when a dominant allele is Recessive allele present; only see when both genes are recessive Organism that has 2 different alleles for a trait; Hybrid organism that is heterozygous for a particular trait Probability ...
Biology First Six Weeks Vocabulary
... An Austrian monk and botanist who established key principles for the study of genetics; the father of genetics ...
... An Austrian monk and botanist who established key principles for the study of genetics; the father of genetics ...
Inheritance and Genetics
... • since 2 alternate forms are present we describe them with capital (dominant) and lower case (recessive) letters • In a homologous pair a dominant allele masks the presence of a recessive allele ...
... • since 2 alternate forms are present we describe them with capital (dominant) and lower case (recessive) letters • In a homologous pair a dominant allele masks the presence of a recessive allele ...
Crossbreeding terminology
... gene at a particular location on a chromosome. For example, blue and brown eyes are determined by different alleles of the gene for eye colour. Chromosomes rod-like structures that are found in the nucleus of all cells. These structures contain genetic information and occur in pairs. Co-dominant two ...
... gene at a particular location on a chromosome. For example, blue and brown eyes are determined by different alleles of the gene for eye colour. Chromosomes rod-like structures that are found in the nucleus of all cells. These structures contain genetic information and occur in pairs. Co-dominant two ...
8.2 Alleles and Genes Interact to Produce Phenotypes
... • Many genes have alleles that are neither dominant or recessive to one another. • There is an intermediate phenotype (Blend) • Example – snapdragons – RR = red – WW – white – RW = pink! ...
... • Many genes have alleles that are neither dominant or recessive to one another. • There is an intermediate phenotype (Blend) • Example – snapdragons – RR = red – WW – white – RW = pink! ...
Allele - Mr Waring`s Biology Blog
... Condition in which the alleles of a particular gene are identical Homozygous Term used to describe a gene that has more than two possible alleles Multiple Alleles A term applied to an allele that is always expressed in the phenotype of an organism ...
... Condition in which the alleles of a particular gene are identical Homozygous Term used to describe a gene that has more than two possible alleles Multiple Alleles A term applied to an allele that is always expressed in the phenotype of an organism ...
Genetics Notes
... does not completely mask another. a)The organism shows a blend of the two. b)Ex: Japanese 4 o’clocks R = red W = white RR x WW RW = pink 6. Codominance – when both alleles contribute to the phenotype of the organism (no blending). a)Ex: cattle color R = red r = white RR x Rr Rr = roan 7. Polygenic t ...
... does not completely mask another. a)The organism shows a blend of the two. b)Ex: Japanese 4 o’clocks R = red W = white RR x WW RW = pink 6. Codominance – when both alleles contribute to the phenotype of the organism (no blending). a)Ex: cattle color R = red r = white RR x Rr Rr = roan 7. Polygenic t ...
Introduction to Genetics
... The dominant allele is seen when in combination with itself or a recessive allele. The recessive allele is never seen when in combination with the dominant, it is only seen with in combination with itself. This doesn’t apply to all genes. ...
... The dominant allele is seen when in combination with itself or a recessive allele. The recessive allele is never seen when in combination with the dominant, it is only seen with in combination with itself. This doesn’t apply to all genes. ...
mendelian genetics guided notes
... 1. Rule of Unit Factors – each organism has 2 alleles that control each trait Ex. 1 allele comes from mom and 1 allele comes from dad 2. Rule of Dominance – In cases in which 2 or more alleles for a single trait exist, one allele may be dominant (mask) to the recessive one Ex. Dominant = TT or Tt R ...
... 1. Rule of Unit Factors – each organism has 2 alleles that control each trait Ex. 1 allele comes from mom and 1 allele comes from dad 2. Rule of Dominance – In cases in which 2 or more alleles for a single trait exist, one allele may be dominant (mask) to the recessive one Ex. Dominant = TT or Tt R ...
Introduction to Genetics
... will always exhibit that trait. Dominant expressed by capital letter ...
... will always exhibit that trait. Dominant expressed by capital letter ...
Chapter 3 Genetics
... - he crossed purebred plants which had opposite traits -in first filial generation, one trait was evident and the other had disappeared - in the second filial generation (F2), one trait showed up in ¾ of the offspring, and the other trait reappeared but only in ¼ of the offspring. Conclusion: - indi ...
... - he crossed purebred plants which had opposite traits -in first filial generation, one trait was evident and the other had disappeared - in the second filial generation (F2), one trait showed up in ¾ of the offspring, and the other trait reappeared but only in ¼ of the offspring. Conclusion: - indi ...
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.