Advertisements
Advertisements
Question
ZZ/ZW type of sex determination is seen in ______.
Options
Peacock
Cockroach
Platypus
Snails
apple snail
human
Advertisements
Solution
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
RELATED QUESTIONS
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?
In a human, how many chromosmes are present in a brain cell?
In a human, how many chromosmes are present in an egg which has just been produced by the ovary?
The human animal which has an XY pair of chromosomes is called :
(a) male
(b) hybrid
(c) female
(d) doomed
In human males all the chromosomes are paired perfectly except one. This/these unpaired chromosomes is/are:
- large chromosome
- small chromosome
- Y chromosome
- X chromosome
Both father and mother have the genes Ee in their cells. What colour are their eyes?
The person A has only B chromosomes in all its gametes. On the other hand, another person C has chromosome D in half of gametes and chromosome E in the other half of gametes. When chromosomes B and D combine during fertilisation, a female zygote results. On the other hand, combination of B and E chromosomes produces a male zygote.
(a) What are chromosomes (i) B (ii) D, and (iii) E?
(b) Out of B, D and E, which two chromosomes are of the same type?
(c) Which chromosome is smaller in size?
(d) What is the general name of chromosomes such as B and E?
(e) Out of the two persons A and C, which one is (i) male, and (ii) female?
Does the sex of the child depend on the father or it is just a matter of chance? Discuss.
What is heterogamety ? Explain the mechanism of sex determinatin in Drosophila.
Define the following:
Sex-linked characters
Choose the correct answer:
A single recessive trait, able to express must be on _________
Give Reason:
Why X-linked recessive diseases are more common among males than females.
Explain the mechanism of sex determination in birds.
Differentiate Intersexes from Supersexes.
Which of the following organisms has haploid number of chromosomes?
The ‘X’ body of Henking was observed in ______.
Haplodiploidy is found in ______.
In XO type of sex determination ______.
Which of the following is an example of genetic variation?
The two versions of a trait (character) which are brought in by the male and female gametes are situated on
In humans, males are heterogametic and females are homogametic. Explain. Are there any examples where males are homogametic and females heterogametic?
Name the two types of gametes produced by men.
Given below are two statements:
Statement - I: The male Drosophila has a pair of homomorphic sex chromosomes.
Statement - II: The male human being has a pair of heteromorphic sex chromosomes.
In the light of above statements, Choose the most appropriate answer from the options given below:
What did H. Henking originally call the nuclear structure he discovered during his 1891 study of squash bug spermatogenesis?
In the XX–XY sex determination system, which sex is considered heterogametic and produces two different types of gametes?
In the XX–XY sex determination system, if a female (XX) is fertilized by an X-bearing sperm, what is the resulting genotype of the offspring?
Which pair of organisms would NOT be expected to share the same sex determination system?
