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Genetic Punnett Squares PPT
Genetic Punnett Squares PPT

... TRAIT COVERED UP BY DOMINATE TRAIT Only seen if 2 recessive genes present. ...
Genetics Constructed Response Answer
Genetics Constructed Response Answer

... Genotypes: Mother XEXe, father XEY and children XEXE, XEXe, XEY, XeY Probability: 25% chance that the male child would inherit the disorder from his mother. 25% chance that one female child would carry the recessive allele for the disorder. 50% chance that two out of the four offspring will not inhe ...
Mendel - Powerpoint
Mendel - Powerpoint

... Law of independent assortment ◦ This states that each gene is passed on independently of each other ◦ If we look at Mendel’s peas that he worked with, there are many traits he saw, for instance ◦ Pea color ◦ Flower color ◦ Pea shape ◦ Pea pod shape ◦ Etc. ◦ Each of these physical traits were passed ...
Simulating Population Genetics
Simulating Population Genetics

... • Relax the assumption that all alleles are equally fit. Choose one of your alleles to be lethal recessive; that is, if the a allele is lethal recessive, aa mice die at birth but Aa and AA mice don’t. How does this change the equilibrium? Can any starting conditions change the final equilibrium? In ...
Sc 1#6 Answers
Sc 1#6 Answers

... In heterozygous individuals one allele is dominant and one is recessive. ...
Student Misconceptions
Student Misconceptions

... that offspring inherit alleles from each parent and that these alleles are expressed and may affect phenotype. They will be less likely to think that traits “skip a generation” or to imagine that offspring inherit an active gene for each trait from only one parent. This exercise will help students f ...
Genetics- the scientific study of heredity
Genetics- the scientific study of heredity

... Genes- A segment of DNA on a chromosome that codes for a specific trait. Genotype-An organism’s genetic makeup, or allele combinations. Phenotype- An organisms physical appearance, or visible traits. Homozygous-Having two identical alleles for a trait. Heterozygous- Having two different alleles for ...
Evolution of Populations (3.1) – Part 2
Evolution of Populations (3.1) – Part 2

... A. This set of math equations is used to follow allele frequency within a population or “Gene pool”. 1. If the numbers (rates) change from generation to generation, the population is evolving over time. 2. If the numbers (rates) do not change from generation to generation, the population is not evol ...
- U
- U

Genetics: The Science of Heredity
Genetics: The Science of Heredity

... b. to clone every gene on a single chromosome in human DNA c. to cure genetic diseases d. to inbreed the best genes on every chromosome in human DNA ______11. What is a genome? a. all the cells produced during meiosis b. all the plasmids produced from inserting DNA into a cell c. all the DNA in one ...
Reading Guide 11-1 Name
Reading Guide 11-1 Name

... 6. The principle of independent assortment states that genes can segregate ___________________________ during the formation of ____________________________. 7. Independent assortment helps account for the many genetic __________________________ observed in plants, animals, and other organisms. 8. Fi ...
Natural Selection
Natural Selection

... but given that genes are copied millions of times in a lifetime, errors can occur. • __________ in the ...
4.2 Patterns of heredity can be predicted
4.2 Patterns of heredity can be predicted

... • The top of the Punnett square shows one parent’s alleles for this trait • Add two dominant regular alleles (DD) on top • Two recessive dwarf alleles (dd) on the side • Each potential offspring would have the same genotype: one dominant and one recessive allele (Dd) • The phenotype would show the d ...
Evolution as Genetic Change
Evolution as Genetic Change

... Evolution as Genetic Change • Natural selection acts on phenotypes, survival and reproduction determine which alleles are inherited, changing relative frequencies of alleles in a population over time. • Thus evolution is any change in the relative frequencies of alleles in a population’s gene pool ...
Genes and Medical Genetics
Genes and Medical Genetics

... long fingers (wwss), what will – Children look like? – Grandchildren look like? ...
Mendelian Genetics and Extensions to Mendelism
Mendelian Genetics and Extensions to Mendelism

... A gene may have more than two alleles Mutiple alleles(复等位基因) A condition in which a particular gene occurs in three or more allelic forms in a population of organisms ABO blood types: I A , I B , i IA ...
Mendelian Genetics
Mendelian Genetics

... • Recessively-inherited disorder (requires both recessive alleles) – One of several “storage disorders”: lipids accumulate in brain because dysfunctional enzymes are produced by recessive genes ...
Punnett square
Punnett square

... The chemical factors that determine traits are called genes. The different forms of a gene are called alleles. ...
Learned traits - Warren County Schools
Learned traits - Warren County Schools

... • Genes are found on chromosomes. • These genes describe an organisms function. • The different forms of a trait that a gene may carry are called alleles. ...
Objectives Mendelian Genetics Gregor Mendel
Objectives Mendelian Genetics Gregor Mendel

... simple recessive traits appear only in the homozygous condition sex-linked recessive sex-linked dominant ...
The Ins and Outs of Pedigree Analysis, Genetic
The Ins and Outs of Pedigree Analysis, Genetic

... BREEDING BY PEDIGREE Outbreeding brings together two dogs less related than the average for the breed. This promotes more heterozygosity, and gene diversity within each dog by matching pairs of unrelated genes from different ancestors. Outbreeding can also mask the expression of recessive genes, an ...
2 + pn
2 + pn

... established before East Asian populations. East Asian populations were established from later migrations out of the Middle East. With each migration, a reduction in population size would lead to bottlenecks and a greater influence from drift, which would lower heterozygosity. Those populations estab ...
Genetics notes
Genetics notes

... • Studied inheritance of traits in pea plants • Used his math background to make new hypotheses about inheritance. • Known as the “Father of Genetics” ...
Genetic Variation is the Key to Natural Selection
Genetic Variation is the Key to Natural Selection

... • Diploidy – the presence of more than one allele is often hidden by a dominant allele. • Occurs even if the gene that is being hidden is lethal. • Ex. most genetic disorders are preserved because of diploidy. ...
Mating Systems 1 Mating According to Index Values
Mating Systems 1 Mating According to Index Values

... In swine there are several breeds, some of which are Yorkshire (Y), Landrace (L), Hampshire (H), and Duroc (D). The Yorkshire and Landrace breeds are known for fast growth, while the Hampshire and Duroc are known for their meat quality. A single cross is a mating between two breeds. For example, fem ...
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Inbreeding

Inbreeding is the sexual reproduction of offspring from the mating or breeding of individuals or organisms that are closely related genetically. By analogy, the term is used in human reproduction, but more commonly refers to the genetic disorders and other consequences that may arise from incestuous sexual relationships and consanguinity.Inbreeding results in homozygosity, which can increase the chances of offspring being affected by recessive or deleterious traits. This generally leads to a decreased biological fitness of a population (called inbreeding depression), which is its ability to survive and reproduce. An individual who inherits such deleterious traits is referred to as inbred. The avoidance of such deleterious recessive alleles caused by inbreeding, via inbreeding avoidance mechanisms, is the main selective reason for outcrossing. Crossbreeding between populations also often has positive effects on fitness-related traits.Inbreeding is a technique used in selective breeding. In livestock breeding, breeders may use inbreeding when, for example, trying to establish a new and desirable trait in the stock, but will need to watch for undesirable characteristics in offspring, which can then be eliminated through further selective breeding or culling. Inbreeding is used to reveal deleterious recessive alleles, which can then be eliminated through assortative breeding or through culling. In plant breeding, inbred lines are used as stocks for the creation of hybrid lines to make use of the effects of heterosis. Inbreeding in plants also occurs naturally in the form of self-pollination.
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