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Document
Document

... 1. Each parent MUST contribute one gene for each trait to the offspring. – Evidence: F2’s had white flowers (present but hidden in F1 generation.) ...
TWO TYPES OF TRAITS
TWO TYPES OF TRAITS

... Three loci, Two alleles ...
Genetics: Mendelian Genetics
Genetics: Mendelian Genetics

... Autosomal Dominant Inheritance One type of dwarfism in humans is caused by a single dominant gene; the condition is called Achondroplastic dwarfism. Dwarf individuals are heterozygous, while persons who are homozygous recessive are of normal stature. The homozygous dominant individuals all die befor ...
Chemistry Unit
Chemistry Unit

... Natural selection is the gradual process of traits becoming more common in a population because the traits may improve reproductive success of organisms in an environment. (It is a key mechanism of evolution) ...
Genetics
Genetics

... Neither allele is dominant Heterozygote phenotype is intermediate between either of the homozygous phenotypes One red allele produces only enough pigment to yield pink color ...
Sex determination
Sex determination

... 9. Utilize product rule in calculating probabilities of genetic events 10. Recognize human pedigree symbols. Employ pedigree analysis to determine if a trait is inherited in an autosomal recessive, autosomal dominant, or sex-linked fashion. 11. Use pedigrees to determine genotype of particular indiv ...
Pedigree Problems:
Pedigree Problems:

... A line drawn down from the marriage line indicates offspring. Sometimes, you will see some shapes filled in only half way this notation indicates a hybrid (heterozygous) or carrier of the trait. ...
Chapter 11 Quiz
Chapter 11 Quiz

... begins to suspect that there was a mix-up at the hospital, because Jill doesn’t look much like either parent or like her sister. When the twins' blood tests come back, the father calls his lawyer to start a lawsuit against the hospital. The mother, father, and Joan have type A blood, but Jill has ty ...
Which is true about a testcross?
Which is true about a testcross?

Biology 12
Biology 12

Hair: Curly or Straight?
Hair: Curly or Straight?

... alleles that the organism possesses, but whose trait is not affected by if a dominant allele is present. But if two recessive alleles are present, the recessive trait is guaranteed to show up, as there is no dominant allele to mask the recessive allele. Although this is usually the case, there are a ...
Mendelian Genetics
Mendelian Genetics

... 3 Pollinated carpel ...
Document
Document

... some rare alleles may be at high frequency; others may be missing  skew the gene pool of new population ...
Answers to Mastering Concepts Questions
Answers to Mastering Concepts Questions

... sexually also has genetic recombination during meiosis to provide variation. 5. What happens to a population if conditions change and no individuals have the allele combinations required to survive and produce offspring? The population would die off or go extinct. 6. Many articles about the rise of ...
Activity Title
Activity Title

... fragmentation. Asexual reproduction is used by bacteria, many plants and fungi, and some animals (generally simpler organisms). Some organisms can reproduce either sexually or asexually depending on conditions of their life history phase. In some cases, more advanced organisms, such as sharks, have ...
Early Ideas of Heredity
Early Ideas of Heredity

Evolution
Evolution

... Individuals of all populations have the capacity to produce more offspring than the environment is able to support, so individuals must compete for resources. Individuals of a population vary in size, form, and other traits. The variant forms of a trait may be more or less adaptive under prevailing ...
IV. Evolution as Genetic Change
IV. Evolution as Genetic Change

... leave more descendants than others by chance. -Over time, a series of chance occurrences of this type can cause an allele to become common in a population. -Can occur when a small group colonizes a new habitat. Founder effect – change in allele frequencies as a result of the migration of a small sub ...
Critical concepts include: pedigrees, autosomal dominant traits
Critical concepts include: pedigrees, autosomal dominant traits

... Chapter Outline I. Troubles With Dog Breeding A. When dogs (or people) reproduce, they pass on their genes, units of heredity that determine what the offspring will be like. 1. Dog breeders rely on this common knowledge when they produce dog breeds. 2. Each breed of dogs has favored traits. a) Golde ...
autosomal inheritance
autosomal inheritance

... eyes and whose father was blue-eyed, while his mother was brown-eyed.  Their only child so far has brown eyes.  What are the genotypes of the child, the parents and all the grandparents, if you know that brown eye colour is dominant over blue? ...
The Genetics of Harry Potter
The Genetics of Harry Potter

Genetic Notes
Genetic Notes

... • He found two plants that were “pure-breds” or true-breeding of certain traits. • Those two plants were called the parent or “P” generation • Once he pollinated those two plants, he waited until seeds were produced, planted them and then observed what characteristics they had • The seeds from the p ...
The Father of Modern Genetics
The Father of Modern Genetics

... How could short peas keep showing up if it were so easy to erase the short trait? This mystery was solved when the first generation of offspring (F1) were mixed. That usually produced three tall plants and one short plant. The second generation (F2) showed that hidden traits carry on to future gener ...
Schedule
Schedule

... any particular one will be randomly selected from paternal or maternal chromosomes (may use an example, eg 23 in humans). Independent assortment is the major source of the genetic variability of offspring. • Crossing over / recombination may or may not occur, and the probability of the recombination ...
Multiple Alleles, Polygenic and Sex
Multiple Alleles, Polygenic and Sex

... - The human Y chromosome is much smaller and appears to contain only few genes. - Father determines the sex of the offspring - The chance is always 50-50 for either sex - A recessive gene has no matching gene on the Y - More Sex linked disorders are found in males Sex linked disorders: 1. Colorblind ...
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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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