Advertisements
Advertisements
प्रश्न
ZZ/ZW type of sex determination is seen in ______.
विकल्प
Peacock
Cockroach
Platypus
Snails
apple snail
human
Advertisements
उत्तर
ZZ/ZW type of sex determination is seen in peacock.
Explanation:
The ZZ/ZW type of sex determination is seen in birds, many fishes, and reptiles. In this system, the female is heterogametic (ZW), meaning she produces two types of eggs,one with the Z chromosome and one with the W chromosome. The male is homogametic (ZZ), producing only one type of sperm with the Z chromosome.
APPEARS IN
संबंधित प्रश्न
Answer the following questions related to sex determination in human beings:
i. What is sex chromosome?
ii. How many pairs of chromosomes are present in human beings?
iii. How is the sex of the human offspring determined?
iv. Draw a diagram depicting sex determination in man.
If X chromosome is inherited from mother and Y from father, the offspring will be male.
Write the types of sex-determination mechanisms the following crosses show. Give an example of each type.
(i) Female XX with Male XO
(ii) Female ZW with Male ZZ
Which of the following is an example of ZW – ZZ type of mechanism of sex determination?
What are the chromosomes XY and XX known as?
Which of the following combinations of sex chromosomes produce a male child : XX or XY?
Fill in the following blank with suitable word :
The...............chromosomes for a ............are XX whereas that for a ..............are XY.
The human animal which has an XY pair of chromosomes is called :
(a) male
(b) hybrid
(c) female
(d) doomed
Which combination of genes in the zygote will produce children with blue eyes?
Which combination of genes in the zygote will produce children with brown eyes?
________ shows haplo-diploid type of sex-determination.
Define the following:
Sex-linked characters
Complete the following sentence with appropriate word:
___________ chromosomes do not take part in sex determination.
XO type of sex determination and XY type of sex determination are examples of ____________.
What is Lyonisation?
How is sex determined in human beings?
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?
Which of the following develops through parthenogene is?
Human offspring’s sex is determined ______
If a normal cell of the human body contains 46 pairs of chromosomes then the numbers of chromosomes in a sex cell of a human being is most likely to be ______
A zygote which has an X-chromosome inherited from the father will develop into a
The two versions of a trait (character) which are brought in by the male and female gametes are situated on
Fill the blank circles in figure and identify the sex of child A and B.
How many types of gametes are produced by a human female?
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 haplodiploidy system observed in honeybees, unfertilized eggs develop into which type of individual?
Which pair of organisms would NOT be expected to share the same sex determination system?
If a male grasshopper with XO genotype produces sperm, what proportion of his sperm will carry the X chromosome?
