A family consists of two parents and their five children and the pedigree chart below shows the inheritance of the trait colour blindness in them. [5 MARKS]

(a) Who is colour blind in the parents - Father or Mother?
(b) How many daughters and how many sons have been born in the family?
(c) What does the child 1 indicate about this trait?
(d) On which chromosome is the gene of this trait located?
(e) Name one other trait in humans which follows the similar pattern of inheritance.

Open in App

Solution

Each Part: 1 Mark

(a) Father is colour blind.
(b) 3 daughters and 2 sons have been born in the family.
(c) Child 1 indicates the colour blind daughter.
(d) 'X' chromosomes have the gene of this trait.
(e) Haemophilia follows a similar pattern of inheritance.

Suggest Corrections

Similar questions

Q. A family consists of two parents and their five children and the pedigree chart below shows the inheritance of the trait colour blindness.
Figure

(i) Who is colour blind in the parents - Father or Mother?
(ii) How many daughters and sons have been born in the family?
(iii) What does the child 1 indicate about this trait?
(iv) Complete the depiction of all probabilities of the trait among the children 2-5 in the chart.
(v) On which chromosome is the gene of this trait located?
(vi) Name one other trait in humans which follows the similar mode of inheritance.

This pedigree shows the inheritance of colour blindness or sex-linked trait. Is this trait dominant or recessive? Is the mother of the colourblind girl in the F3 generation colourblind, a carrier or a person with normal colour vision? Explain. [4 MARKS]

Q. This pedigree is of a rare trait, in which children have extra fingers and toes. Which one of the following patterns of inheritance is consistent with this pedigree?

Q. Given below is a pedigree chart showing the inheritance of a certain linked trait in humans. The trait traced in the above pedigree chart is

Q. Given below is a pedigree chart showing the inheritance of a certain sex-linked trait in humans. What is the trait traced in the below pedigree chart ?

Join BYJU'S Learning Program

Each Part: 1 Mark (a) Father is colour blind. (b) 3 daughters and 2 sons have been born in the family. (c) Child 1 indicates the colour blind daughter. (d) 'X' chromosomes have the gene of this trait. (e) Haemophilia follows a similar pattern of inheritance.

Each Part: 1 Mark

(a) Father is colour blind.
(b) 3 daughters and 2 sons have been born in the family.
(c) Child 1 indicates the colour blind daughter.
(d) 'X' chromosomes have the gene of this trait.
(e) Haemophilia follows a similar pattern of inheritance.