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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
Differentiate between 'ZZ' and 'XY' type of sex-determination mechanisms.
Write notes on sex determination in the unborn baby.
Which of the two, sperm or ovum, decides the sex of the child?
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 sperm in the testes?
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
The number of pair(s) of sex chromosomes in the zygote of humans is :
(a) one
(b) two
(c) three
(d) four
Give Reason:
Why X-linked recessive diseases are more common among males than females.
Explain the mechanism of sex determination in birds.
ZW-ZZ system of sex determination occurs in
How many ovum are formed when a diploid cell undergoes meiosis, during oogenesis?
From the following which option correctly represents the normal genetic constitution of a ovum?
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 |
Number of autosomes present in liver cells of a human female is ______.
Which of the following combination of chromosome numbers represents the correct sex determination pattern in honey bees?
A man with blood group A marries a woman having blood group O. What will be the blood group of the child?
A woman has only daughters. Analyse the situation genetically and provide a suitable explanation.
Female heterogamy is shown by
Which of the following group shows ZW-ZZ type of sex determination?
