A man whose father was colour blind marries a woman who had a colour blind mother and normal father. What percentage of male children of this couple will be colour blind? (a) 25% (b) 0% (c) 50% (d) 75%

A man whose father was colour blind marries a
woman who had a colour blind mother and normal
father. What percentage of male children of this
couple will be colour blind?
(a) 25% (b) 0%
(c) 50% (d) 75%
by

1 Answer

Answer :

(c) 50%
by

Related questions

.A normal-visioned man whose father was colour- blind, marries a woman whose father was also colour-blind. They have their first child as a daughter. What are the chances that this child would be colour-blind? (a) 100% (b) Zero percent (c) 25% (d) 50%

Description : .A normal-visioned man whose father was colour- blind, marries a woman whose father was also colour-blind. They have their first child as a daughter. What are the chances that this child would be colour-blind? (a) 100% (b) Zero percent (c) 25% (d) 50%

Last Answer : Zero percent

A normal-visioned man whose father was colour-blind, marries a woman whose father was also colour-blind. They have their first child as a daughter. What are the chances that this child would be colour-blind ? (1) 50% (2) 100% (3) Zero percent (4) 25%

Description : A normal-visioned man whose father was colour-blind, marries a woman whose father was also colour-blind. They have their first child as a daughter. What are the chances that this child would be colour-blind ? (1) 50% (2) 100% (3) Zero percent (4) 25%

Last Answer : (3) Zero percent

A woman with normal vision, but whose father was colour blind, marries a colour blind man. Suppose that the fourth child of this couple was a boy. This boy (a) may be colour blind or may be of normal vision (b) must be colour blind (c) must have normal colour vision (d) will be partially colour blind since he is heterozygous for the colour blind mutant allele

Description : A woman with normal vision, but whose father was colour blind, marries a colour blind man. Suppose that the fourth child of this couple was a boy. This boy (a) may be colour blind or ... colour vision (d) will be partially colour blind since he is heterozygous for the colour blind mutant allele

Last Answer : (a) may be colour blind or may be of normal vision

Both husband and wife have normal vision though their fathers were colour blind. The probability of their daughter becoming colour blind is (a) 0% (b) 25% (c) 50% (d) 75%.

Description : Both husband and wife have normal vision though their fathers were colour blind. The probability of their daughter becoming colour blind is (a) 0% (b) 25% (c) 50% (d) 75%.

Last Answer : (a) 0%

.A person whose father is colour blind marries a lady whose mother is daughter of a colour blind man. Their children will be (a) all sons colour blind (b) some sons normal and some colour blind (c) all colour blind (d) all daughters normal.

Description : .A person whose father is colour blind marries a lady whose mother is daughter of a colour blind man. Their children will be (a) all sons colour blind (b) some sons normal and some colour blind (c) all colour blind (d) all daughters normal.

Last Answer : (d) all daughters normal.

.A normal woman, whose father was colour-blind is married to a normal man. The sons would be (a) 75% colour-blind (b) 50% colour-blind (c) all normal (d) all colour-blind.

Description : .A normal woman, whose father was colour-blind is married to a normal man. The sons would be (a) 75% colour-blind (b) 50% colour-blind (c) all normal (d) all colour-blind.

Last Answer : (b) 50% colour-blind

A woman with two genes for haemophilia and one gene for colour blindness on one of the ‘X’ chromosomes marries a normal man. How will the progeny be? (a) 50% haemophilic colour-blind sons and 50% normal sons. (b) 50% haemophilic daughters (carrier) and 50% colour blind daughters (carrier). (c) All sons and daughters haemophilic and colour- blind. (d) Haemophilic and colour-blind daughters.

Description : A woman with two genes for haemophilia and one gene for colour blindness on one of the X' chromosomes marries a normal man. How will the progeny be? (a) 50% haemophilic colour-blind sons ... ). (c) All sons and daughters haemophilic and colour- blind. (d) Haemophilic and colour-blind daughters.

Last Answer : (b) 50% haemophilic daughters (carrier) and 50% colour blind daughters (carrier).

4. A haemophilic man marries a normal homozygous woman. What is the probability that their son will be haemophilic a) 100% b) 75 % c) 50% d) 0%

Description : 4. A haemophilic man marries a normal homozygous woman. What is the probability that their son will be haemophilic a) 100% b) 75 % c) 50% d) 0%

Last Answer : d) 0%

Down’s syndrome is caused by an extra copy of chromosome number 21. What percentage of offspring produced by an affected mother and a normal father would be affected by this disorder? (a) 100% (b) 75% (c) 50% (d) 25%

Description : Down’s syndrome is caused by an extra copy of chromosome number 21. What percentage of offspring produced by an affected mother and a normal father would be affected by this disorder? (a) 100% (b) 75% (c) 50% (d) 25%

Last Answer : (c) 50%

Blue eye colour is recessive to brown eye colour. A brown eyed man whose mother was blue eyed marries a blue-eyed woman. The children will be (a) both blue eyed and brown eyed 1 : 1 (b) all brown eyed (c) all blue eyed (d) blue eyed and brown eyed 3 : 1.

Description : Blue eye colour is recessive to brown eye colour. A brown eyed man whose mother was blue eyed marries a blue-eyed woman. The children will be (a) both blue eyed and brown eyed 1 : 1 (b) all brown eyed (c) all blue eyed (d) blue eyed and brown eyed 3 : 1.

Last Answer : (a) both blue eyed and brown eyed 1 : 1

A white woman marries a black man. They have four children — 2 sons and 2 daughters. What proportion of these chi 1dren is likely to be black (a) 25% (b) 50% (c) 100% (d) none

Description : A white woman marries a black man. They have four children — 2 sons and 2 daughters. What proportion of these chi 1dren is likely to be black (a) 25% (b) 50% (c) 100% (d) none

Last Answer : Ans:(d)

.If a colour blind woman marries a normal visioned man, their sons will be (a) all colour blind (b) all normal visioned (c) one-half colour blind and one-half normal (d) three-fourths colour blind and one-fourth normal.

Description : .If a colour blind woman marries a normal visioned man, their sons will be (a) all colour blind (b) all normal visioned (c) one-half colour blind and one-half normal (d) three-fourths colour blind and one-fourth normal.

Last Answer : (a) all colour blind

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 ? (a) Nil (b) 0.25 (c) 0.5 (d) 1

Description : 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 ? (a) Nil (b) 0.25 (c) 0.5 (d) 1

Last Answer : b) 0.25

If a colour-blind man marries a woman who is homozygous for normal colour vision, the probability of their son being colour-blind is (a) 0 (b) 0.5 (c) 0.75 (d) 1.

Description : If a colour-blind man marries a woman who is homozygous for normal colour vision, the probability of their son being colour-blind is (a) 0 (b) 0.5 (c) 0.75 (d) 1.

Last Answer : a) 0

Albinism is known to be due to an autosomal recessive mutation. The first child of a couple with normal skin pigmentation was an albino. What is the probability that their second child will also be an albino? (a) 50% (b) 75% (c) 100% (d) 25%

Description : Albinism is known to be due to an autosomal recessive mutation. The first child of a couple with normal skin pigmentation was an albino. What is the probability that their second child will also be an albino? (a) 50% (b) 75% (c) 100% (d) 25%

Last Answer : (d) 25%

When a color blind man marries a woman pure for normal color vision, it is probable that one of the following situations may result. Is it probable that a) all the children will be color blind b) all the grandchildren will be color blind c) only the sons will be colorblind d) half the grandsons will be color blind

Description : When a color blind man marries a woman pure for normal color vision, it is probable that one of the following situations may result. Is it probable that a) all the children will be color blind b) ... will be color blind c) only the sons will be colorblind d) half the grandsons will be color blind

Last Answer : ANSWER: D -- HALF THE GRANDSONS WILL BE COLOR BLIND

Of both normal parents, the chances of a male child becoming colour blind are (a) none (b) possible only when all the four grand parents had normal vision (c) possible only when father’s mother was colour blind (d) possible only when mother’s father was colour blind.

Description : Of both normal parents, the chances of a male child becoming colour blind are (a) none (b) possible only when all the four grand parents had normal vision (c) possible only when father’s mother was colour blind (d) possible only when mother’s father was colour blind.

Last Answer : (d) possible only when mother’s father was colour blind.

A marriage between normal visioned man and colour blind woman will produce offspring (a) colour blind sons and 50% carrier daughter (b) 50% colourblind sons and 50% carrier daughter (c) normal males and carrier daughters (d) colour blind sons and carrier daughters.

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Last Answer : (d) colour blind sons and carrier daughters.

For ductility consideration, the maximum percentage of steel used should not exceed ------- of the balanced steel [ A ] 25% [ B ] 50% [ C ] 60% [ D ] 75%

Description : For ductility consideration, the maximum percentage of steel used should not exceed ------- of the balanced steel [ A ] 25% [ B ] 50% [ C ] 60% [ D ] 75%

Last Answer : [ D ] 75%

A colour blind girl is rare because she will be born only when (a) her mother and maternal grand father were colour blind (b) her father and maternal grand father were colour blind(c) her mother is colour blind and father has normal vision (d) parents have normal vision but grand parents were colour blind

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Last Answer : b) her father and maternal grand father were colour blind

A colour blind mother and normal father would have (a) colour blind sons and normal/carrier daughters (b) colour blind sons and daughters (c) all colour blind (d) all normal

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Last Answer : (a) colour blind sons and normal/carrier daughters

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Last Answer : (c) Sex-linked disease

If a dwarf pea plant was treated with gibberellic acid, it became as tall, as tall pea plants. If these pea plants are crossed with pure tall pea plants, what will be the phenotypic ratio in F1 generation? (a) All dwarf plants (b) 50% tall and 50% dwarf plants (c) 75% tall and 25% dwarf plants (d) 100% tall plants

Description : If a dwarf pea plant was treated with gibberellic acid, it became as tall, as tall pea plants. If these pea plants are crossed with pure tall pea plants, what will be the phenotypic ratio in F1 generation? ... (b) 50% tall and 50% dwarf plants (c) 75% tall and 25% dwarf plants (d) 100% tall plants

Last Answer : Ans. ((d))

Accumulators should have adequate volume to store refrigerant charge at least (a) 10% (b) 25% (c) 50% (d) 75%

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100% modulation in AM means a corresponding increase in total power by: A. 25% B. 75% C. 100% D. 50%

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Last Answer : D. 50%

Due to the cross between TTRr × ttrr the resultant progenies show what percent of tall, red flowered plants? (a) 50% (b) 75% (c) 25% (d) 100%

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Last Answer : (a) 50%

In a plant, red fruit (R) is dominant over yellow fruit (r) and tallness (T) is dominant over shortness (t). If a plant with RRTt genotype is crossed with a plant that is rrtt, (a) 25% will be tall with red fruit (b) 50% will be tall with red fruit (c) 75% will be tall with red fruit (d) all the offspring will be tall with red fruit

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Last Answer : (b) 50% will be tall with red fruit

tt mates with Tt. What will be characteristic of offspring? (a) 75% recessive (b) 50% recessive (c) 25% recessive (d) All dominant

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Last Answer : b) 50% recessive

Which of the following represents a racemic mixture? (a) 75% (R)-2-butanol, 25% (S)-2-butanol (b) 25% (R)-2-butanol, 75% (S)-2-butanol (c) 50% (R)-2-butanol, 50% (S)-2-butanol (d) none of the above

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Cooling efficiency of a cooling tower is significantly affected under cross-wind condition and might decrease to……… in the range of moderate to high wind velocity condition. a) 50% c) 25% b) 75% d) 90%

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Last Answer : Ans: A High rating transformer has higher impedance. kVA rating α Impedance of transformer

In the P generation, a tall plant is crossed with a short plant. The probability that an F2 plant will be tall is a. 50%. b. 75%. c. 25%. d. 100%.

Description : In the P generation, a tall plant is crossed with a short plant. The probability that an F2 plant will be tall is a. 50%. b. 75%. c. 25%. d. 100%.

Last Answer : b. 75%.

The density of lead is 12 grams per cm3. A lead brick has a mass of 1.5 kilograms. Its dimensions are 10 cm by 5 cm by 4 cm. Is it: w) More than 75% hollow x) Between 50 and 75% hollow y) Between 25 and 50% hollow z) Between 0 and 25% hollow

Description : The density of lead is 12 grams per cm3. A lead brick has a mass of 1.5 kilograms. Its dimensions are 10 cm by 5 cm by 4 cm. Is it: w) More than 75% hollow x) Between 50 and 75% hollow y) Between 25 and 50% hollow z) Between 0 and 25% hollow

Last Answer : ANSWER: Y -- BETWEEN 25 AND 50% HOLLOW

Before a woman marries a man, does she wonder what their children will look like?

Description : Before a woman marries a man, does she wonder what their children will look like?

Last Answer : I didn’t.

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Last Answer : (d) all normal.

.A diseased man marries a normal woman. They get three daughters and five sons. All the daughters were diseased and sons were normal. The gene of this disease is (a) sex linked dominant (b) sex linked recessive (c) sex limited character (d) autosomal dominant.

Description : .A diseased man marries a normal woman. They get three daughters and five sons. All the daughters were diseased and sons were normal. The gene of this disease is (a) sex linked dominant (b) sex linked recessive (c) sex limited character (d) autosomal dominant.

Last Answer : (a) sex linked dominant

Two jars having a capacity of 3 and 5 litres respectively are filled with mixtures of milk and water. In the smaller jar 25% of the mixture is milk and in the larger 25% of the mixture is water. The jars are emptied into a 10 litre cask whose remaining capacity is filled up with water. Find the percentage of milk in the cask. a) 55% b) 50% c) 45% d) 25% e) None of these

Description : Two jars having a capacity of 3 and 5 litres respectively are filled with mixtures of milk and water. In the smaller jar 25% of the mixture is milk and in the larger 25% of the mixture is water. The jars are emptied ... the percentage of milk in the cask. a) 55% b) 50% c) 45% d) 25% e) None of these

Last Answer : Answer: D 0.75+3.75=4.5/10+8*100=4.5/18*100=25%

The percentage of water for making a cement paste of normal consistency varies from (a) 15 to 25% (b) 25 to 35% (c) 35 to 50% (d) 50 to 60%

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Last Answer : (b) 25 to 35%

The percentage of Sinhala-speakers in Sri Lanka is the Tamil-speakers are percent. a. 74% and 18% b. 75% and 25% c. 59% and 41% d. 80% and 20%

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Last Answer : a. 74% and 18%

Rosy buys Oats at Rs.10/kg and sell it in order to earn a profit of 40%. However, her faulty balance shows 1000gm when it is actually 800gm. What is her actual gain percentage? a) 35% b) 70% c) 75% d) 25% e) None of the Above

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Last Answer : Let price of 1 kg rice = Rs.10. CP of 800 gm rice = Rs.8. She wants to earn a profit of 40% on per Kg SP = 10 + 40% of 10 = Rs. 14 per kg. Faulty balance shows 800 gm = 1000 gm (1 kg) She sells 800 gm for Rs.14. Profit = 14 – 8 = Rs. 6. Profit(%) = 6/8 * 100 = 75%. Answer: c)

.Of a normal couple, half the sons are haemophiliac while half the daughters are carriers. The gene is located on (a) X-chromosome of father (b) Y-chromosome of father (c) one X-chromosome of mother (d) both the X-chromosomes of mother

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Last Answer : (c) one X-chromosome of mother

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Four people are sitting around a campfire after a long day of recreation, when one man comments: 'Do you realize that around this campfire, the four of us include a mother, father, brother, sister, son, daughter, niece, nephew, aunt, uncle and a couple cousins'?. If everyone is related by blood (with no unusual marriages) how is this possible? -Riddles

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Last Answer : The campfire circle includes a woman and her brother. The woman's daughter and the man's son are also present.

A man of A-blood group marries a woman of AB blood group. Which type of progeny would indicate that man is heterozygous A? (a) AB (b) A (c) O (d) B

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A man with blood group ‘A’ marries a woman with blood group ‘B’. What are all the possible blood groups of their offspring? (a) A, B, AB and O (b) O only (c) A and B only (d) A, B and AB only

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Last Answer : (a) A, B, AB and O

A fuel of an octane number rating of 75 matches in knocking intensity as a mixture of a) 75% iso-octane and 25% normal heptane b) 75% normal heptane and 25% iso-octane c) 75% petrol and 25% diesel d) 75% diesel and 25% petrol

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Last Answer : Answer: a Explanation: None.

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According to the World Bank, during the period 1996 to 2000, the approximate percentage loss of gross domestic produce due to disasters was? a. 2.85% b. 2.25% c. 2.50% d.1.95%

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Last Answer : b. 2.25%