PPT File
... conducted 8 years of experiments on pea plants. As a result of his experiments, a set of basic principles of heredity was established. Mendel is known as the founder of genetics. Mendel proposed that characteristics were inherited as result of the transmission of hereditary factors (genes). ...
... conducted 8 years of experiments on pea plants. As a result of his experiments, a set of basic principles of heredity was established. Mendel is known as the founder of genetics. Mendel proposed that characteristics were inherited as result of the transmission of hereditary factors (genes). ...
OCR Biology B - Centre of the Cell
... terms gene, allele (gene variant), locus, phenotype, genotype, dominant and recessive, heterozygous and homozygous and codominant. (b) gene mutations. To include cystic fibrosis, sickle cell anaemia. ...
... terms gene, allele (gene variant), locus, phenotype, genotype, dominant and recessive, heterozygous and homozygous and codominant. (b) gene mutations. To include cystic fibrosis, sickle cell anaemia. ...
Advanced Punnet Squares Pages 183-184, 244 Test Cross: Used to
... Sex-Linked Traits: diseases/genes found only on the X sex chromosomes. Gender is determined by the sex chromosomes (#23 for humans) XX= female XY =male Recessive Sex linked traits are more common in males than females because if the male receives a recessive gene then there is no other gene pres ...
... Sex-Linked Traits: diseases/genes found only on the X sex chromosomes. Gender is determined by the sex chromosomes (#23 for humans) XX= female XY =male Recessive Sex linked traits are more common in males than females because if the male receives a recessive gene then there is no other gene pres ...
Life Science NJ ASK Review
... • An individual with identical alleles of a gene is homozygous gene – Examples: BB or bb, TT or tt ...
... • An individual with identical alleles of a gene is homozygous gene – Examples: BB or bb, TT or tt ...
Lab #4: Quiz
... “P” and “p”. The “P” allele is dominant and determines the purple flower color phenotype and the “p” allele is recessive and determines the white flower color phenotype. Seed shape is controlled by a single gene with two alleles, designated “R” and “r”. The “R” allele is dominant and determines the ...
... “P” and “p”. The “P” allele is dominant and determines the purple flower color phenotype and the “p” allele is recessive and determines the white flower color phenotype. Seed shape is controlled by a single gene with two alleles, designated “R” and “r”. The “R” allele is dominant and determines the ...
Hardy Weinberg Problem Set
... A. The frequency of the "aa" genotype. .36 B. The frequency of the "a" allele. .6 C. The frequency of the "A" allele. .4 D. The frequencies of the genotypes "AA" and "Aa." .16 and .48 E. The frequencies of the two possible phenotypes if "A" is completely dominant over "a." .36 will show recessive tr ...
... A. The frequency of the "aa" genotype. .36 B. The frequency of the "a" allele. .6 C. The frequency of the "A" allele. .4 D. The frequencies of the genotypes "AA" and "Aa." .16 and .48 E. The frequencies of the two possible phenotypes if "A" is completely dominant over "a." .36 will show recessive tr ...
Genetics
... • Both alleles [forms of the gene] are the same • When offspring inherit two dominant genes, (one dominant gene from each parent) they are said to be homozygous dominant • When offspring inherit two recessive genes, (one recessive gene from each parent) they are ...
... • Both alleles [forms of the gene] are the same • When offspring inherit two dominant genes, (one dominant gene from each parent) they are said to be homozygous dominant • When offspring inherit two recessive genes, (one recessive gene from each parent) they are ...
Name______________________________________
... 4. ____________________ the process in which an egg cell and a sperm cell join to form a new organism 5. ____________________ the different forms of a gene 6. ____________________ an allele whose trait always shows up in the organism when the allele is present 7. ____________________ a characteristi ...
... 4. ____________________ the process in which an egg cell and a sperm cell join to form a new organism 5. ____________________ the different forms of a gene 6. ____________________ an allele whose trait always shows up in the organism when the allele is present 7. ____________________ a characteristi ...
Fundamental Principles of Variation
... generation of random mating. 2) According to the H-W principle not only ___Genotype frequencies_, but also__allele frequencies___, remain unchanged from generation to generation. The H-W principle only holds true if you take into consideration certain assumptions. 1) ___Mating is random_____ 2) ___T ...
... generation of random mating. 2) According to the H-W principle not only ___Genotype frequencies_, but also__allele frequencies___, remain unchanged from generation to generation. The H-W principle only holds true if you take into consideration certain assumptions. 1) ___Mating is random_____ 2) ___T ...
Constructing A Human Lab
... 21. How many homozygous dominant (2 capital) traits did your child have? _________ 22. How many homozygous recessive (2 lower case) traits did your child have?_______ 23. How many heterozygous (1 capital, 1 recessive) traits did your baby have? _______ 24. What determines the traits your baby has?__ ...
... 21. How many homozygous dominant (2 capital) traits did your child have? _________ 22. How many homozygous recessive (2 lower case) traits did your child have?_______ 23. How many heterozygous (1 capital, 1 recessive) traits did your baby have? _______ 24. What determines the traits your baby has?__ ...
Ch. 14 - ltcconline.net
... 12. Give an example of incomplete dominance and explain why it does not support the blending theory of inheritance. 13. Explain how phenotypic expression of the heterozygote differs with complete dominance, incomplete dominance, and codominance. 14. Explain why Tay-Sachs disease is considered recess ...
... 12. Give an example of incomplete dominance and explain why it does not support the blending theory of inheritance. 13. Explain how phenotypic expression of the heterozygote differs with complete dominance, incomplete dominance, and codominance. 14. Explain why Tay-Sachs disease is considered recess ...
genetics and human development
... 5. Genotype refers to the ______________ make-up of an organism. 6. _____________ is the physical trait that is expressed in an individual. 7. __________ are the different forms of a gene for any given trait. ...
... 5. Genotype refers to the ______________ make-up of an organism. 6. _____________ is the physical trait that is expressed in an individual. 7. __________ are the different forms of a gene for any given trait. ...
Population Genetics Populations evolve Evolution = change in allele
... Honest coins? If flip 2 coins and results were: 90- 2 head 10- one each H + T 0- 2 tails Honest coins? ...
... Honest coins? If flip 2 coins and results were: 90- 2 head 10- one each H + T 0- 2 tails Honest coins? ...
Honors Biology Chapter 12 Notes 12.1 Pedigrees A diagram that
... Recessive genetic disorder characterized by the inability of the body to digest galactose Dominant Genetic Disorders ...
... Recessive genetic disorder characterized by the inability of the body to digest galactose Dominant Genetic Disorders ...
Genetics Test Study Guide
... It shows all the ways in which alleles for a particular trait can be combined ...
... It shows all the ways in which alleles for a particular trait can be combined ...
Work of Gregor Mendel
... Phenotype—physical characteristics (the plant is tall or the plant is short) ...
... Phenotype—physical characteristics (the plant is tall or the plant is short) ...
Genetics Notes
... _________________ CHROMOSOME-A ______of _____________chromosomes in an organism, with _____ being inherited from each parent. _________________- A chromosome that is ______ a ______ chromosome. Let's Summarize: Genotype- ____________________________________________ (usually abbreviated as 2 letters) ...
... _________________ CHROMOSOME-A ______of _____________chromosomes in an organism, with _____ being inherited from each parent. _________________- A chromosome that is ______ a ______ chromosome. Let's Summarize: Genotype- ____________________________________________ (usually abbreviated as 2 letters) ...
File
... an alternative form of a gene (an option for a gene) Gene= eye color Allele= blue, green, brown, gray Gene= Hairline Allele= Striaght, widow’s peak ...
... an alternative form of a gene (an option for a gene) Gene= eye color Allele= blue, green, brown, gray Gene= Hairline Allele= Striaght, widow’s peak ...
chapter 14
... 14. Explain how phenotypic expression of the heterozygote differs with complete dominance, incomplete dominance, and codominance. 15. Explain why Tay-Sachs disease is considered recessive at the organismal level but codominant at the molecular level. 16. Explain why genetic dominance does not mean t ...
... 14. Explain how phenotypic expression of the heterozygote differs with complete dominance, incomplete dominance, and codominance. 15. Explain why Tay-Sachs disease is considered recessive at the organismal level but codominant at the molecular level. 16. Explain why genetic dominance does not mean t ...
Mendelian Genetics
... A. These disorders tend to be very harmful to the organism. B. They ONLY occur in the HOMOZYGOUS RECESSIVE state. 1. There is nothing to be dominated by, so the disorder is present. C. Carriers – These are organisms that are heterozygous in genotype. (They are 50/50 in terms of passing on the trait. ...
... A. These disorders tend to be very harmful to the organism. B. They ONLY occur in the HOMOZYGOUS RECESSIVE state. 1. There is nothing to be dominated by, so the disorder is present. C. Carriers – These are organisms that are heterozygous in genotype. (They are 50/50 in terms of passing on the trait. ...
Section 7.1: Chromosomes and Phenotype
... Not all genes work with a straight dominant-recessive relationship Some work with a RANGE of dominance ...
... Not all genes work with a straight dominant-recessive relationship Some work with a RANGE of dominance ...
Punnett Squares
... for a particular trait will only exhibit that trait when the dominant allele is not present; Will only show if both alleles are present Represented by a lower case letter ...
... for a particular trait will only exhibit that trait when the dominant allele is not present; Will only show if both alleles are present Represented by a lower case letter ...
Dihybrid Crosses Note
... The probability of two or more outcomes occurring is equal to the product of their individual probabilities What is the probability of giving birth to two boys? Determine the probability that a plant of genotype CcWw will be produced from the following cross: CcWw x Ccww ...
... The probability of two or more outcomes occurring is equal to the product of their individual probabilities What is the probability of giving birth to two boys? Determine the probability that a plant of genotype CcWw will be produced from the following cross: CcWw x Ccww ...
Natural selection, continued
... Hardy-Weinberg theorem Why is Hardy-Weinberg population said to be at an equilibrium? fr(A) = 0.2, fr(a) = 0.8 ...
... Hardy-Weinberg theorem Why is Hardy-Weinberg population said to be at an equilibrium? fr(A) = 0.2, fr(a) = 0.8 ...
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.