Color Blindness Is an X-Linked Recessive Gene

question 50

Short Answer

Color blindness is an X-linked recessive gene. Two normal-vision parents produce a color-blind child.
(a)Is this child male or female?
(b)What are the genotypes of the parents?
(c)What are the chances that their next child will be a color-blind daughter?

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Definitions:

Iris Diaphragm

A mechanical adjustable aperture in optical devices that controls the amount of light passing through by adjusting its size.

Condensers

In the context of laboratory equipment, condensers are devices used to cool vapors and condense them into liquids; in electrical engineering, they are an older term for capacitors, components that store electrical energy.

Oil-Immersion Objective

A microscope objective lens designed to be used with a drop of oil to increase resolution by reducing refraction of light.

Total Magnification

The overall enlargement of an image seen with a microscope, calculated by multiplying the objective lens magnification by the ocular lens magnification.