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प्रश्न
उत्तर
a. There are 22 pairs of autosomes and one pair of sex chromosomes present in human beings.
b. In females 22 pairs of autosomes and XX sex chromosomes are present.
c. In males 22 pairs of autosomes and XY pair of sex chromosomes.
d. In human males, two dissimilar chromosomes are present in 23rd pair, the longer 'X' and the shorter 'Y'. In females, the 23rd pair contains two similar 'X' chromosomes. All children inherit one 'X' chromosome from their mother. The other chromosome is inherited from the father. If the chromosome inherited from the father is 'X', then the offspring is a daughter and if it is 'Y', then the offspring is a son.
Thus, the sex of the child is determined by the male sex chromosome.
APPEARS IN
संबंधित प्रश्न
Differentiate between male and female heterogamety
Fill in the following blank with suitable word :
Genes always work in ................ .
Explain how, sex is determined in human babies.
The exchange of genetic material takes place in :
(a) vegetative reproduction
(b) asexual reproduction
(c) sexual reproduction
(d) budding
A zygote which has inherited an X chromosome from the father will develop into :
(a) baby boy
(b) baby girl
(c) adult
(d) either boy or girl
Choose the correct answer:
Males have more chances of suffering from sex-linked disease because of ___________
Drone of the honeybees shows haploid number of chromosomes. Illustrate.
Answer the following question:
How is sex determined in human beings? Explain with the help of a diagram.
Give Reason:
Why X-linked recessive diseases are more common among males than females.
What is male heterogamety?
How is sex determined in human beings?
Sex is determined in human beings ______.
Which of the following is incorrect regarding ZW - ZZ type of sex determination?
Number of autosomes present in liver cells of a human female is ______.
The number of pairs of sex chromosomes in the zygote of a human being is ______
Human offspring’s sex is determined ______
Female heterogamy is shown by
In humans, males are heterogametic and females are homogametic. Explain. Are there any examples where males are homogametic and females heterogametic?
How many types of gametes are produced by a human female?
