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प्रश्न
Differentiate between male and female heterogamety.
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उत्तर
Male heterogamety: Male heterogamety includes human males having XY sex chromosomes and males of some insects, such as grasshopper and bugs, having XO sex chromosomes.
Female heterogamety: Female heterogamety includes females of some species of birds, fishes and insects. Females of butterfly and moth consist ZO sex chromosomes, while females of fish, reptiles and birds consist ZW sex chromosomes.
संबंधित प्रश्न
Explain sex determination in human beings.
Explain the mechanism of 'sex determination' in birds. How does it differ from that of human beings?
In a human, how many chromosmes are present in an egg which has just been produced by the ovary?
A normal cell of human body contains 23 pairs of chromosomes. The number of chromosomes in a sex cell (sperm or ovum) of a human being is most likely to be :
(a) 46
(b) 23
(c) 21
(d) 42
________ shows haplo-diploid type of sex-determination.
Choose the correct answer from the four options given below :
In a human male, a sperm will contain :
Drone of the honeybees shows haploid number of chromosomes. Illustrate.
Short Answer Question.
“Father is responsible for determination of sex of child and not the mother”. Justify.
Explain the mechanism of sex determination in humans with a suitable chart.
Identify the female heterogamety from the chromosomal complements given below.
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 ______.
Structures present in a cell which is responsible for determination of the sex of a baby is ______.
In humans, males are heterogametic and females are homogametic. Explain. Are there any examples where males are homogametic and females heterogametic?
Which biological mechanism establishes whether an individual develops as male or female based on genetic or chromosomal factors?
Which of the following organisms exhibits the XX–XY sex determination system?
