Check In Review #3 Evolution and Genetics

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What is the process of transcription in genetics?

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Transcription is the process by which the DNA sequence of a gene is copied into mRNA. This occurs in the nucleus of eukaryotic cells.

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What is the role of mRNA in protein synthesis?

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mRNA (messenger RNA) carries the genetic information from DNA to the ribosome, where it serves as a template for protein synthesis.

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What is a DNA sequence?

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A DNA sequence is a series of nucleotides (adenine, thymine, cytosine, guanine) that encodes genetic information.

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What does it mean for a trait to be sex-linked?

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A sex-linked trait is one that is associated with a gene located on a sex chromosome, often affecting males and females differently.

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What is the significance of DNA similarities in evolutionary biology?

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Similarities in DNA sequences indicate genetic relatedness and can provide evidence for common ancestry among species.

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What is a recessive trait?

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A recessive trait is one that is expressed only when two copies of the allele are present; it is masked by a dominant allele.

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How can DNA analysis change species classification?

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DNA analysis can reveal genetic similarities or differences that may not be visible morphologically, leading to reclassification of species.

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What is the probability of inheriting a recessive trait from heterozygous parents?

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The probability of inheriting a recessive trait from heterozygous parents is 25% for each child.

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What is the difference between genotype and phenotype?

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Genotype refers to the genetic makeup of an organism, while phenotype is the observable physical or biochemical characteristics.

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What is the function of ribosomes in protein synthesis?

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Ribosomes are the cellular structures where proteins are synthesized by translating mRNA into amino acid sequences.