Hippocrates, among many other philosophers, pondered heredity and came up with the theory of pangenesis, which states that sex involves the transfer of miniaturized, invisible body parts (Human Genetics, Notes p. 407). ... According to Darwin, the organs of an animal had "gemmules" that accumulated in the sex organs and were consequently exchanged during sexual reproduction (Darwin Species). ... These unpaired chromosomes came to be known as the sex cells and coincided with Mendel's observation that his pea plant sperm cells carried a single copy of factors (DNA Watson). ... Using the ...

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The categories are; autosomal recessive, autosomal dominant and sex-linked. Autosomal' refers to mutations affecting the non-sex chromosomes (1-22). Where as sex-linked defects arise from mutations which occur on the sex chromosomes. Autosomal conditions affect males and females at equal frequencies, where as sex-linked conditions affect the sexes differently. ... An example of each of a single gene defect has been chosen for each of the categories of; autosomal recessive and dominant and sex-linked. ...

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Therefore, the scratch marks on the bullet match the scratch marks in the barrel of the gun that fired it, to the exclusion of all other weapons."3 This action is tested in a lab by firing a bullet using the weapon that is thought to be from the crime scene. The test bullet is compared to a bullet found at the crime scene under a comparison microscope. ... This personality description can include age, sex, occupation, behavioral disorders, upbringing, marital status, they type of place the person would live in and its general condition, the type of person the criminal might live with, wha...

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At its simplest, the scientific method begins by making observations, then proposing explanations, and finally testing those explanations. ... Experiment/Test. ... A well-designed experiment will test that prediction. ... Other experiments are simply quantitative observations and might be better described as tests. Astronomy is a science in which many experiments are essentially what I have just described as tests. 6. ...

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