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प्रश्न
What is male heterogamety?
उत्तर
Male heterogamety (XY males) is a type of sex determination in which males produce two different types of gametes. For example, human males produce two kinds of sperms that is sperm with X- chromosome and sperms with Y- chromosome.
संबंधित प्रश्न
Name the species used in sericulture. Name the stages in the life cycle of a silk moth in cyclic form.
Write notes on sex determination in the unborn baby.
If a normal human cell has 46 chromosomes, how many chromosomes will be there in a human (i) sperm cell, and (ii) zygote?
In a human, how many chromosmes are present in a fertilised egg?
In human males all the chromosomes are paired perfectly except one. This/these unpaired chromosomes is/are :
(i) large chromosome
(ii) small chromosome
(iii) Y chromosome
(iv) X chromosome
Choose the correct answer :
Human sex chromosomes are __________
Choose the correct answer:
Males have more chances of suffering from sex-linked disease because of ___________
Choose the correct answer:
A man can transfer his sex-linked gene to his ______________
Short Answer Question.
“Father is responsible for determination of sex of child and not the mother”. Justify.
What is parthenogenesis?
Identify the female heterogamety from the chromosomal complements given below.
The ‘X’ body of Henking was observed in ______.
The number of pairs of sex chromosomes in the zygote of a human being is ______
A trait in an organism is influenced by
Sex in honey bee is determined by ______.
Sex of an individual is determined by different factors in various species. Some animals rely entirely on the environmental ones, while in some other animals the individuals can change their sex during their life time indicating that sex of some species is not genetically determined. However in human beings, the sex of an individual is largely determined genetically.
- In what way are the sex chromosomes 'X' and 'Y' different in size? Name the mismatched pair of sex chromosome in humans.
- Write the number of pair/pairs of sex chromosomes present in human beings. In which one of the parent (male/female) perfect pair/pairs of sex chromosome are present?
- Citing two examples, justify the statement "Sex of an individual is not always determined genetically".
OR
Draw a flow chart to show that sex is determined genetically in human beings.
Which of the following group shows ZW-ZZ type of sex determination?
The sex chromosome in a human ovum is ______.
