342445
Red -green colour blindness in human beings is governed by a sex-linked recessive gene. A normal woman whose father was colourblind marries a colourblind man. What proportion of their sons is expected to be colour blind?
1 \(1/2\)
2 \(0/1\)
3 \(1/4\)
4 All
Explanation:
It is a cross between carrier woman \(\left( {X{X^c}} \right)\) and colourblind \(\left( {{X^c}Y} \right)\) man.
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342446
Persons who are colourblind cannot distinguish
1 Yellow and white colour
2 Red and green colour
3 Black and white colour
4 Yellow and blue colour
Explanation:
Persons with colour blindness also known as color vision deficiency, have decreased ability to recognize color and commonly have difficulty in distinguishing colours between reds and green. This is because of absence of cone cells in the eye.
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342447
Gene for colour blindness is located on
1 X - chromosomes
2 Y - chromosomes
3 21 st chromosomes
4 13 th chromosomes
Explanation:
Genes for colourblindness are located on the X chromosome.
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342448
Red-green colour blindness is x- linked in humans. If a male is red-green colour blind and both parents have normal colour vision, which of the male’s grandparent can be coloured blind?
1 Maternal grandmother
2 Paternal grandmother
3 Maternal grandfather
4 Both 1 and 3
Explanation:
Maternal grandparent passed on the genes to his daughter who is the carrier mother of the colourblind son
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342449
A colour blind man marries a woman with normal sight who has no history of colour blindness in her family. What is the probability of their grandson being colour blind
1 0.25
2 1
3 Nil
4 0.5
Explanation:
The daughters of the colour blind man and normal sighted woman pair will have normal eye sight and carrier if one of the carrier daughter marries with a normal eyed man.than their son 25% may be affected.
342445
Red -green colour blindness in human beings is governed by a sex-linked recessive gene. A normal woman whose father was colourblind marries a colourblind man. What proportion of their sons is expected to be colour blind?
1 \(1/2\)
2 \(0/1\)
3 \(1/4\)
4 All
Explanation:
It is a cross between carrier woman \(\left( {X{X^c}} \right)\) and colourblind \(\left( {{X^c}Y} \right)\) man.
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342446
Persons who are colourblind cannot distinguish
1 Yellow and white colour
2 Red and green colour
3 Black and white colour
4 Yellow and blue colour
Explanation:
Persons with colour blindness also known as color vision deficiency, have decreased ability to recognize color and commonly have difficulty in distinguishing colours between reds and green. This is because of absence of cone cells in the eye.
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342447
Gene for colour blindness is located on
1 X - chromosomes
2 Y - chromosomes
3 21 st chromosomes
4 13 th chromosomes
Explanation:
Genes for colourblindness are located on the X chromosome.
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342448
Red-green colour blindness is x- linked in humans. If a male is red-green colour blind and both parents have normal colour vision, which of the male’s grandparent can be coloured blind?
1 Maternal grandmother
2 Paternal grandmother
3 Maternal grandfather
4 Both 1 and 3
Explanation:
Maternal grandparent passed on the genes to his daughter who is the carrier mother of the colourblind son
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342449
A colour blind man marries a woman with normal sight who has no history of colour blindness in her family. What is the probability of their grandson being colour blind
1 0.25
2 1
3 Nil
4 0.5
Explanation:
The daughters of the colour blind man and normal sighted woman pair will have normal eye sight and carrier if one of the carrier daughter marries with a normal eyed man.than their son 25% may be affected.
342445
Red -green colour blindness in human beings is governed by a sex-linked recessive gene. A normal woman whose father was colourblind marries a colourblind man. What proportion of their sons is expected to be colour blind?
1 \(1/2\)
2 \(0/1\)
3 \(1/4\)
4 All
Explanation:
It is a cross between carrier woman \(\left( {X{X^c}} \right)\) and colourblind \(\left( {{X^c}Y} \right)\) man.
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342446
Persons who are colourblind cannot distinguish
1 Yellow and white colour
2 Red and green colour
3 Black and white colour
4 Yellow and blue colour
Explanation:
Persons with colour blindness also known as color vision deficiency, have decreased ability to recognize color and commonly have difficulty in distinguishing colours between reds and green. This is because of absence of cone cells in the eye.
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342447
Gene for colour blindness is located on
1 X - chromosomes
2 Y - chromosomes
3 21 st chromosomes
4 13 th chromosomes
Explanation:
Genes for colourblindness are located on the X chromosome.
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342448
Red-green colour blindness is x- linked in humans. If a male is red-green colour blind and both parents have normal colour vision, which of the male’s grandparent can be coloured blind?
1 Maternal grandmother
2 Paternal grandmother
3 Maternal grandfather
4 Both 1 and 3
Explanation:
Maternal grandparent passed on the genes to his daughter who is the carrier mother of the colourblind son
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342449
A colour blind man marries a woman with normal sight who has no history of colour blindness in her family. What is the probability of their grandson being colour blind
1 0.25
2 1
3 Nil
4 0.5
Explanation:
The daughters of the colour blind man and normal sighted woman pair will have normal eye sight and carrier if one of the carrier daughter marries with a normal eyed man.than their son 25% may be affected.
342445
Red -green colour blindness in human beings is governed by a sex-linked recessive gene. A normal woman whose father was colourblind marries a colourblind man. What proportion of their sons is expected to be colour blind?
1 \(1/2\)
2 \(0/1\)
3 \(1/4\)
4 All
Explanation:
It is a cross between carrier woman \(\left( {X{X^c}} \right)\) and colourblind \(\left( {{X^c}Y} \right)\) man.
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342446
Persons who are colourblind cannot distinguish
1 Yellow and white colour
2 Red and green colour
3 Black and white colour
4 Yellow and blue colour
Explanation:
Persons with colour blindness also known as color vision deficiency, have decreased ability to recognize color and commonly have difficulty in distinguishing colours between reds and green. This is because of absence of cone cells in the eye.
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342447
Gene for colour blindness is located on
1 X - chromosomes
2 Y - chromosomes
3 21 st chromosomes
4 13 th chromosomes
Explanation:
Genes for colourblindness are located on the X chromosome.
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342448
Red-green colour blindness is x- linked in humans. If a male is red-green colour blind and both parents have normal colour vision, which of the male’s grandparent can be coloured blind?
1 Maternal grandmother
2 Paternal grandmother
3 Maternal grandfather
4 Both 1 and 3
Explanation:
Maternal grandparent passed on the genes to his daughter who is the carrier mother of the colourblind son
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342449
A colour blind man marries a woman with normal sight who has no history of colour blindness in her family. What is the probability of their grandson being colour blind
1 0.25
2 1
3 Nil
4 0.5
Explanation:
The daughters of the colour blind man and normal sighted woman pair will have normal eye sight and carrier if one of the carrier daughter marries with a normal eyed man.than their son 25% may be affected.
342445
Red -green colour blindness in human beings is governed by a sex-linked recessive gene. A normal woman whose father was colourblind marries a colourblind man. What proportion of their sons is expected to be colour blind?
1 \(1/2\)
2 \(0/1\)
3 \(1/4\)
4 All
Explanation:
It is a cross between carrier woman \(\left( {X{X^c}} \right)\) and colourblind \(\left( {{X^c}Y} \right)\) man.
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342446
Persons who are colourblind cannot distinguish
1 Yellow and white colour
2 Red and green colour
3 Black and white colour
4 Yellow and blue colour
Explanation:
Persons with colour blindness also known as color vision deficiency, have decreased ability to recognize color and commonly have difficulty in distinguishing colours between reds and green. This is because of absence of cone cells in the eye.
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342447
Gene for colour blindness is located on
1 X - chromosomes
2 Y - chromosomes
3 21 st chromosomes
4 13 th chromosomes
Explanation:
Genes for colourblindness are located on the X chromosome.
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342448
Red-green colour blindness is x- linked in humans. If a male is red-green colour blind and both parents have normal colour vision, which of the male’s grandparent can be coloured blind?
1 Maternal grandmother
2 Paternal grandmother
3 Maternal grandfather
4 Both 1 and 3
Explanation:
Maternal grandparent passed on the genes to his daughter who is the carrier mother of the colourblind son
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342449
A colour blind man marries a woman with normal sight who has no history of colour blindness in her family. What is the probability of their grandson being colour blind
1 0.25
2 1
3 Nil
4 0.5
Explanation:
The daughters of the colour blind man and normal sighted woman pair will have normal eye sight and carrier if one of the carrier daughter marries with a normal eyed man.than their son 25% may be affected.
