What is the reason for the absence of hybrids?

  • A
    Punnett square
  • B
    Linkage
  • C
    Crossing over
  • D
    Heterozygosity

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When two genes are situated very close to each other on a chromosome:

Given below is a highly simplified representation of the human sex chromosomes from a karyotype. The genes $a$ and $b$ could be of

$A$: Crossing over is the exchange of genetic material between non-homologous chromosomes.
$R$: It produces new linkages.

Linkage in Drosophila was first discovered by

Who coined the term 'linkage'?

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