In humans, free earlobes are dominant and attached earlobes are recessive. The pedigree shows the transmission of attached earlobes through four generations of a family. Note the four offspring in the fourth generation, individuals 27, 28 29, and 30. What conclusions can you draw about their mother, individual 22? Explain.

By analyzing a pedigree, we can determine genotypes, identify phenotypes, and predict how a trait will be passed on in the future. The information from a pedigree makes it possible to determine how certain alleles are inherited: whether they are dominant, recessive, autosomal, or sex-linked.The Punnett square is a square diagram that is used to predict the genotypes of a particular cross or breeding experiment. It is named after Reginald C. Punnett, who devised the approach. The diagram is used by biologists to determine the probability of an offspring having a particular genotype.Changes (mutations) to genes can result in changes to proteins, which can affect the structures and functions of the organism and thereby change traits. Variations of inherited traits between parent and offspring arise from genetic differences that result from the subset of chromosomes (and therefore genes) inherited.

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the mass of the cathode increases because ions from the solution get reduced to atoms and become part of the cathode.

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