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Question
What is Lyonisation?
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Solution
Lyonisation is a process of inactivation of one of the X chromosomes in some females.
RELATED QUESTIONS
"The sex of a newborn child is a matter of chance and none of the parents may be considered responsible for it". Draw a flow chart showing determination of sex of a newborn to justify this statement.
In a human, how many chromosmes are present in an egg which has just been produced by the ovary?
Name any two genetic in humans.
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?
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The cell which determines the sex of a baby.
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| 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 |
How is the sex of a newborn individual determined in different species of animals? Give three examples to support your answer.
