A man with blood group A marries a woman | Class 10 Science Chapter Heredity and Evolution, Heredity and Evolution NCERT Solutions

Question:

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?

Answer:

This information is not enough to tell which of the traits A or O dominant. In human hereditary characters, A, B, ABO blood group is dominant or O is recessive. But in the above case we cannot detect which blood group is dominant. If father’s blood group is A, genotypes will be homozygous AA or heterozygous AO. And women having the blood group O, then the genotype will be homozygous OO and heterozygous AO.

If A is dominant, the cross of father genotype I^AI^A with mother have I^oI^o and the progeny will have 50- 50 percent of the genetic material, where the father blood group is A and mother’s is O.

I^A I^A

I^AI^O	I^AI^O
I^AI^O	I^AI^O

I^oI^o

If the blood group O is dominant, when we cross the father genotype I^AI^O with the mother genotype I^oI^o, the child will contain blood group O.

I^A I^o

I^AI^O	I^OI^O
I^AI^O	I^OI^O

I^oI^o

So, in both cases the child will have O. So, this is not clear which trait is dominant.

1
0
0
Report?

Report a problem on Specifications:

Email id:

Comments

< Previous Question

Next Question >

Popular questions of class 10 Science

When a 12 V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. Find the value of the resistance of the resistor.

Outline a project which aims to find the dominant coat colour in dogs.

Draw the structure for the following compounds.

(i) Ethanoic acid (ii) Bromopentane*
(iii) Butanone (iv) Hexanal.

*Are structural isomers possible for bromopentane?

A hot plate of an electric oven connected to a 220 V line has two resistance coils A and B, each of 24 Ω resistance, which may be used separately, in series, or in parallel. What are the currents in the three cases?

How is the sex of the child determined in human beings?

(a) What property do all elements in the same column of the Periodic Table as boron have in common?
(b) What property do all elements in the same column of the Periodic Table as fluorine have in common?

Calculate the number of electrons constituting one coulomb of charge.

What is an homologous series? Explain with an example.

Why is variation beneficial to the species but not necessarily for the individual?

Give an example of a metal which

(i) is a liquid at room temperature.
(ii) can be easily cut with a knife.
(iii) is the best conductor of heat.
(iv) is a poor conductor of heat.

Recently Viewed Questions of Class 10 Science

Explain the terms analogous and homologous organs with examples.

Which of the following property of a proton can change while it moves freely in a magnetic field? (There may be more than one correct answer.)

(a) mass (b) speed
(c) velocity (d) momentum

How is the sex of a newborn determined in humans?

Why should curd and sour substances not be kept in brass and copper vessels?

Differentiate between inherited and acquired characters. Give one example for each type.

Explain the nature of the covalent bond using the bond formation in CH₃Cl.

What are the limitations in obtaining energy from wind?

What are the different ways in which individuals with a particular trait may increase in a population?

How much energy is given to each coulomb of charge passing through a 6 V battery?

Evolution has exhibited a greater stability of molecular structure when compared with morphological structures. Comment on the statement and justify your opinion.

Study Tips for Answering NCERT Questions:

NCERT questions are designed to test your understanding of the concepts and theories discussed in the chapter. Here are some tips to help you answer NCERT questions effectively:

Read the question carefully and focus on the core concept being asked.
Reference examples and data from the chapter when answering questions about Heredity and Evolution.
Review previous year question papers to get an idea of how such questions may be framed in exams.
Practice answering questions within the time limit to improve your speed and accuracy.
Discuss your answers with your teachers or peers to get feedback and improve your understanding.

Comments

Comment(s) on this Question

Welcome to the NCERT Solutions for Class 10 Science - Chapter . This page offers a step-by-step solution to the specific question from Excercise 2 , Question 3: A man with blood group A marries a woman with blood group O and their daughter has blood group O. Is....

A man with blood group A marries a woman | Class 10 Science Chapter Heredity and Evolution, Heredity and Evolution NCERT Solutions

< Previous Question

Next Question >

Popular questions of class 10 Science

Recently Viewed Questions of Class 10 Science

Study Tips for Answering NCERT Questions:

Comments

Comment(s) on this Question

Chapters for Class 10 Science

Subjects for Class 10

Students Also Read

Important links

Quick Links

Resources

Support