Examples of breeding in the following topics:
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- Selective breeding is a field concerned with testing hypotheses and theories of evolution by using controlled experiments.
- Selective breeding of plants and animals has led to varieties that differ dramatically from their original wild-type ancestors.
- Examples are the cabbage varieties, maize, or the large number of different dog breeds .
- This Chihuahua mix and Great Dane show the wide range of dog breed sizes created using artificial selection, or selective breeding.
- Illustrate how controlled experiments have allowed human beings to selectively breed domesticated plants and animals.
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- Mendel's crosses involved mating two true-breeding organisms that had different traits to produce new generations of pea plants.
- Mendel performed crosses, which involved mating two true-breeding individuals that have different traits .
- In one of his experiments on inheritance patterns, Mendel crossed plants that were true-breeding for violet flower color with plants true-breeding for white flower color (the P generation).
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- The result is highly inbred, or "true-breeding," pea plants.
- Today, we know that these "true-breeding" plants are homozygous for most traits.
- When Mendel cross-pollinated a true-breeding plant that only produced yellow peas with a true-breeding plant that only produced green peas, he found that the first generation of offspring is always all yellow peas.
- In this and all the other pea plant traits Mendel followed, one form of the trait was "dominant" over another so it masked the presence of the other "recessive" form in the first generation after cross-breeding two homozygous plants..
- By experimenting with true-breeding pea plants, Mendel avoided the appearance of unexpected (recombinant) traits in offspring that might occur if the plants were not true breeding.
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- They also protect biodiversity in many ways, such as through captive breeding and private farming.
- Captive breeding is the process of breeding rare or endangered species in human-controlled environments with restricted settings, such as wildlife preserves and conservation facilities.
- Captive breeding is meant to prevent species extinction and to stabilize the population of the species so that it will not disappear.
- Additionally, if the captive-breeding population is too small, then inbreeding may occur due to a reduced gene pool, which may also reduce immunity.
- This species was successfully saved through captive breeding programs after almost being hunted to extinction in China.
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- Mendel crossed or mated two true-breeding (self-pollinating) garden peas, Pisum saivum, by manually transferring pollen from the anther of a mature pea plant of one variety to the stigma of a separate mature pea plant of the second variety.
- When true-breeding plants in which one parent had white flowers and one had violet flowers were cross-fertilized, all of the F1 hybrid offspring had violet flowers .
- That is, the hybrid offspring were phenotypically identical to the true-breeding parent with violet flowers.
- In one of his experiments on inheritance patterns, Mendel crossed plants that were true-breeding for violet flower color with plants true-breeding for white flower color (the P generation).
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- "Slave
breeding" refers to those practices of slave ownership that aimed to influence
the reproduction of slaves in order to increase the profit and wealth of
slaveholders.
- Such breeding was in part motivated by the 1808 federal ban on
the importation of slaves, which was enacted during an intense period of
competition in cotton production between the South and the West.
- Slave breeding
involved coerced sexual relations between male and female slaves, as well as
sexual relations between a master and his female slaves, with the intention of
producing slave children.
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- Mendel discovered that by crossing true-breeding white flower and true-breeding purple flower plants, the result was a hybrid offspring.
- He did this by cross-breeding dihybrids; that is, plants that were heterozygous for the alleles controlling two different traits.
- In one of his experiments on inheritance patterns, Mendel crossed plants that were true-breeding for violet flower color with plants true-breeding for white flower color (the P generation).
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- Genes can be manipulated by selective breeding, which can have an enormous impact on behavior.
- In another example, Seymour Benzer discovered he could breed certain fruit flies with others to create distinct behavioral characteristics and change their circadian rhythms.
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- People have used biotechnology processes, such as selectively breeding animals and fermentation, for thousands of years .
- Improved methods for animal breeding have also resulted from these efforts.
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- When fertilization occurs between two true-breeding parents that differ in only one characteristic, the process is called a monohybrid cross, and the resulting offspring are monohybrids.
- To demonstrate a monohybrid cross, consider the case of true-breeding pea plants with yellow versus green pea seeds.
- For a monohybrid cross of two true-breeding parents, each parent contributes one type of allele.
- In the P generation, pea plants that are true-breeding for the dominant yellow phenotype are crossed with plants with the recessive green phenotype.