Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 12-science Answered

A normal visioned woman whose father is color blind, married a normal visioned man. What are the probablities of her sons or daughters to be color blind. Explain with the help of punnets square  
Asked by khairnardarshan57 | 26 Feb, 2019, 05:53: PM
answered-by-expert Expert Answer

Colourblindness is an X-linked recessive trait caused due to the defective allele on the X chromosome.

In this problem,

Since the father is colourblind, his genotype would be XcY.

Although the woman has colourblind father, her vision is normal. This implies that she is a carrier of the trait. Therefore, her genotype would be.

This carrier woman marries a man with a normal vision.

 

X

Y

Xc

XcX

Daughter: Carrier

XcY

Son: Colourblind

X

XX

Daughter: Normal

XY

Son: Normal


From the above Punnett square, we can deduce that 50% of the daughter are carriers while 50% are normal. 50% of the sons are colourblind while 50% are normal. 

Answered by Sheetal Kolte | 26 Feb, 2019, 06:50: PM
CBSE 12-science - Biology
Asked by sherry.sharma771 | 30 Jan, 2023, 08:05: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Biology
Asked by goyalpavitarta | 16 May, 2021, 12:26: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Biology
Asked by ibrahimbathisha121 | 11 Apr, 2021, 05:34: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Biology
q=?
question image
Asked by nitinkashyap669 | 06 Oct, 2020, 09:30: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Biology
Asked by maahichandel22 | 10 May, 2020, 12:02: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Biology
Asked by mayurgogoi8228 | 03 May, 2019, 08:32: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
Get Latest Study Material for Academic year 24-25 Click here
×