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प्रश्न
Complete the following sentence with appropriate word:
___________ chromosomes do not take part in sex determination.
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उत्तर
Autosomes chromosomes do not take part in sex determination.
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संबंधित प्रश्न
In a human, how many chromosmes are present in a brain cell?
In a human, how many chromosmes are present in a skin cell?
A family consists of two parents and their five children and the pedigree chart below shows the inheritance of the trait colour blindness in them.
Who is colour blind in the parents – the Father or the Mother?
Explain the mechanism of sex determination in birds.
What is Lyonisation?
What is male heterogamety?
Identify the female heterogamety from the chromosomal complements given below.
Match the items of Column I with Column II:
| Column I | Column II | ||
| i. | XX-XO method of Sex Determination | a. | Turner syndrome |
| ii. | XX-XY method of Sex Determination | b. | Female heterog ametic |
| iii. | karyotype-45 | c. | Grasshopper |
| iv. | ZW-ZZ method of Sex Determination | d. | Female homogametic |
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.
In the XX–XO sex determination system, what does the 'O' represent?
