Mendel crossed different varieties of pea plants and he observed how phenotypic traits passed to the progeny. From these experiments, Mendel formulated the 'First Law of Segregation', where he observed that traits may exist in pairs that segregate (separate) at meiosis. During meiosis, i.e., gamete formation, these two factors separate from each other, thereby each gamete has the same probability of receiving either factor. Nowadays, we know that these two factors represent two different gene variants or 'alleles' for a given gene locus. Alleles can be classified into dominant or recessive as in the example above described, where the R factor (round) dominates on the r factor (wrinkled) to determine the seed shape.

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2 years ago

Sodium and potassium ions are essential for muscle contractions of the heart. The ions are transported using a pump, which obtai

emmasim [6.3K]

The sodium and potassium ions are transported using a sodium potassium pump the process of moving sodium and potassium ions across the cell membrane.

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3 years ago

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How does the theory of evolution disprove the belief that natural selection prepares an organism to adapt to its environment?

Rufina [12.5K]

B). A population changes in response to a change in the environment.

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3 years ago