A man with blood group A marries a woman with blood group O and their daughter has blood group O.

Monjur Alahi

A man with blood group A marries a woman with blood group O and their daughter has blood group O. Is this information enough to tell you which of the traits − blood group A or O − is dominant? Why or why not?


0 like 0 dislike
1 views
Share with your friends

2 Answers

Salim Ahmed Kawsar

Call

No. This information is not sufficient to determine which of the traits − blood group A or O − is dominant. This is because we do not know about the blood group of all the progeny. Blood group A can be genotypically AA or AO. Hence, the information is incomplete to draw any such conclusion.

0 like 0 dislike
1 views
Talk Doctor Online in Bissoy App
Salim Ahmed Kawsar

Call

The given information is not enough to tell us which of the traits- blood group A or O - is dominant. In blood heredity, blood type A is always dominant and blood type O is always recessive. Here, father’s blood group can be AA (homozygous) or AO (heterozygous) genotypically, where as that of mother can be OA or OO. For daughter to be born with blood group O, she must receive O type gene one each from father and mother. For this father must have heterozygous AO blood group and mother must have homozygous blood group OO.

0 like 0 dislike
1 views
Talk Doctor Online in Bissoy App
why is a person with blood group 'o' considered a universal donor ? what is special in such blood group ? 1 Answers 1 views
A woman has only daughters. Analyse the situation genetically and provide a suitable explanation.

(a) The woman produces ova with ‘X’ chromosome (b) The man produces sperms with X and Y chromosome which actually determines the sex of the baby.

1 Answers 1 views
Are the following statements in keeping with democracy as a value? Why? (a) Father to daughter: I don’t want

(a) In this case, the daughter does not have the freedom of choice, hence this is undemocratic. (b) The teacher may be involved in thinking about an important topic and hence...

1 Answers 2 views
Which of the following voices is likely to have minimum frequency? (a) Baby girl (b) Baby boy (c) A man (d) A woman

Correct Answer is: (c)  The voice of a man is of lower pitch as compared to voice of a baby girl, baby boy or a woman. Since frequency of sound is...

1 Answers 1 views
Ruminants such as cows and buffaloes swallow their food hurriedly and then sit restfully and chew their food. Can you reason why?

Hint (to digest the food completely.)

1 Answers 4 views
Sudha is an enterprising business woman who has been running a poultry farm for the past ten years.

(i) Investment decision/ Capital budgeting decision Investment/ Capital budgeting decision involves deciding about how the funds are invested in different assets so that they are able to earn the highest...

1 Answers 1 views
The sum of the ages of a man and his son is 45 years. Five years ago, the product of their ages was four times the man’s age at the time.

Let the present age of the son be x years Given that, sum of present ages of man and his son is 45 years. ⇒ Man’s present age = (45 – x)years And also...

1 Answers 1 views
“In me she has drowned a young girl, and in me an old woman. Rises towards her day after day like a terrible fish”.

(i) The woman who is seeing her image in mirror. (ii) The mirror is the speaker. (iii) She was growing old. (iv) Personification is used.

1 Answers 1 views
A 60 kg man pushes a 40 kg man by a force of 60 N. The 40 kg man has pushed the other man with a force of.

(c) 60N. Explanation: According to Newton’s third law, which states that an action-reaction pair of forces are equal in magnitude, the man who weighs 40 kg will push the other man with...

1 Answers 1 views
The binding energy per nucleon for the parent nucleus is E1 and that for the daughter nuclei is E2.

(d) :- After decay, the daughter nuclei will be more stable, hence binding energy per nucleon of daughter nuclei is more than that of their parent nucleus. Hence, E2 > E1

1 Answers 2 views
X