Question
How is sex determined in human beings?
✓
Answer
Humans have 47wQbNPTDJp9hMYdvogK2hAUiHsGeiybwaWe36bwtRQ3UTpYV7YuZ8FV5j9nauFCWwcjM6dTzpL5s2N79Rp5unwdMvc8ZKU and the remaining 1 pair is the sex chromosome that determines the sex of the child. In humans sex chromosome is of two types X and Y. The genetic composition of females is 44+XX whereas males have a genetic composition of 47wQbNPTDJp9hMYdvogK2hAUiHsGeiybwaWe36bwtRQ3UTpYV7YuZ8FV5j9nauFCWwcjM6dTzpL5s2N79Rp5unwdMvc8ZKUchromosomes from one parent and the other half from another the diploid state is restored. Now, the gametes formed by the female is all 22+X where as males produce two types of gametes, 22+X and 22+Y. During fertilization if the female gamete with 22+X chromosome is fertilized by the sperm bearing 22+X chromosome the resulting zygote has the genetic composition as 44+XX thus giving rise to a female child. But, if the female gamete with 22+X chromosome is fertilized by the sperm bearing 22+Y chromosome the resulting zygote has the genetic composition as 47wQbNPTDJp9hMYdvogK2hAUiHsGeiybwaWe36bwtRQ3UTpYV7YuZ8FV5j9nauFCWwcjM6dTzpL5s2N79Rp5unwdMvc8ZKUsperm that fertilizes the ovum and not the other way round.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Draw a diagrammatic labelled sectional view of a seminiferous tubule of a human.
Study the illustration given and answer the questions that follow:
What do you understand by sex-determi-nation?###What is sex determination? Describe various types of sex determination
The melding of a technique for repeated rounds of DNA synthesis with the discovery of a thermostable DNA polymerase has given scientists the very powerful technique known as polymerase chain reaction (PCR). PCR is based on three simple steps required for any DNA synthesis reaction: (1) denaturation of the template into single strands; (2) annealing of primers to each original strand for new strand synthesis; and (3) extension of the new DNA strands from the primers.
In the given figure, one cycle of polymerase chain reaction (PCR) is shown:
i. Name the steps A, B and C.
ii. Give the purpose of each of these steps.
iii. State the contribution of Thermus aquaticus in this process.
In the given figure, one cycle of polymerase chain reaction (PCR) is shown:
i. Name the steps A, B and C.
ii. Give the purpose of each of these steps.
iii. State the contribution of Thermus aquaticus in this process.
Answer the following question.
Draw a diagrammatic sectional view of human ovary showing different stages of oogenesis along with corpus luteum.
Draw a diagrammatic sectional view of human ovary showing different stages of oogenesis along with corpus luteum.
Describe various methods of contraception for the population control.###What are the main types of methods of birth control?###Discuss use of Various Contraceptive measures used for population.
Draw only well labelled diagram of 8-nucleate angiospermic embryosac.
Write two differences between spermatogenesis and oogenesis.
What are the methods of cancer detection? Describe the common approaches for treatment of cancer.
Categorise the following plants into hydrophytes, halophytes, mesophytes and xerophytes. Give reasons for your answers.
- Salvinia.
- Opuntia.
- Rhizophora.
- Mangifera.