Refer to the following information to answer the questions below.

a man who is an achondroplastic dwarf with normal vision marries a color-blind woman of normal height. the man's father was 6 feet tall, and both the woman's parents were of average height. achondroplastic dwarfism is autosomal dominant, and red-green color blindness is x-linked recessive.

what proportion of their sons would be color-blind and of normal height?

1/4

Explanation:

Let achondroplastic dwarfism be controlled by gene A

Let red green color blindness be controlled by gene Xc

Man : He is dwarf so he will be either AA or Aa since its a dominant trait.  His father had normal height so he must be aa. He will pass on one "a" allele to his son. Hence, the man's genotype is Aa. He has normal vision and colorblindness is recessive X-linked trait so his total genotype is AaXCY

Woman : She has normal height so her genotype is aa. She is colorblind hence her total genotype will be aaXcXc.

When,  

AaXCY   X   aaXcXc :

If we check the crosses individually:

    A     a

a  Aa   aa

a  Aa   aa

      XC      Y

Xc  XCXc  XcY

Xc  XCXc  XcY

All the sons will be colorblind (XcY) and half of the children will have normal height (aa). Out of these children half will be sons so total probability of having a colourblind son with normal height will be :

1 * 1/2 * 1/2 = 1/4

measuring physical properties lab reportinstructions: in the physical properties lab, you will test the physical properties of different building materials in order to pick the appropriate materials for a new home in tiny world. record your observations and test measurements in the lab report below. youwill submit your completed report.name and title: lyric lawton, mr.herbert, 10/13/17, physical properties lab. objective(s): i need to parvus build his house out of the right material, so he will stay cool in the mountains.hypothesis: if we use wood to build the roof of the house, then the temperature inside the house will remain cooler.if we use clay brick to build the walls and floors of the house, then the temperature inside the house will remain cooler.if we use aluminium to bring electricity into the home, then it will allow electricity to flow into the home at a faster rate.if we use iron to construct the latches on the windows and doors, then the magnetism will keep the latches secure.