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Zorluk: OrtaBasic Genetics Terminology and Concepts

During a genetic survey of a fruit fly (*Drosophila melanogaster*) population, scientists observed variations in eye color caused by different molecular versions of the gene controlling pigment production located at the same locus on homologous chromosomes. Which term correctly identifies these alternative functional forms of a single gene?

  1. AllelesCevap
  2. B
    Chromatids
  3. C
    Phenotypes
  4. D
    Monohybrids

Cevap

Alleles are the alternative forms of a gene occupying the same gene locus on homologous chromosomes.
The term allele refers directly to one of two or more alternative versions of a gene that arise by mutation and are found at the same place (locus) on a chromosome.

Adım Adım Çözüm

1
Identify the biological concept described in the stem.
The stem describes different structural/molecular versions of a single gene that reside at the same chromosomal position (locus).
Genes often exist in more than one form within a population, giving rise to variations in specific traits.
2
Differentiate between gene structure terms and chromosomal/phenotypic terms.
The term 'allele' specifically denotes these alternative versions of a gene (e.g., red vs. white eye color genes in *Drosophila*).
Understanding the distinction between a gene locus, an allele, a chromatid, and a phenotypic trait is essential in basic genetics.

Anahtar Kavram

Alleles as alternative forms of a gene at a specific locus
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Basic Genetics Terminology and Concepts

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