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

  • A
    colour blindness and body height
  • B
    attached ear lobe and Rhesus blood group
  • C
    haemophilia and red-green colour blindness
  • D
    phenylketonuria and haemophilia

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Mendel observed that some characters did not assort independently. Later researchers found it to be due to

The number of linkage groups in a cell having $10$ pairs of chromosomes is.....

Mendel studied seven pairs of traits in pea plants,which allow for $21$ possible combinations. If you are told that one of these combinations does not show independent assortment in a subsequent study,what would be your reaction?

What is the result of linkage and crossing over?

$A$: Morgan's cross $III$ was conducted in $Drosophila$ to locate genes on the chromosome for white eye color.
$R$: The cross was done between red-eyed hybrid female and white-eyed male.

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