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प्रश्न
Give reason for the following:
A male honey bee has 16 chromosomes whereas a female has 32 chromosomes.
उत्तर
Female honey bees (Queen or worker bees) are diploid having 32 chromosomes since they develop from the fertilized egg. On the other hand, the male honey bees (drones) develop from unfertilized egg possessing only 16 chromosomes (i.e., Haploid)
संबंधित प्रश्न
Name two main processes of sexual reproduction
How does reproduction help in providing stability to populations of species?
What is amphimixis?
A zygote is formed as a result of fertilisation.
An embryo is made up of a single cell.
In which female reproductive organ does the embryo get embedded?
Differentiate between internal fertilization and external fertilization.
Write the importance of sexual reproduction in nature.
What is the other name of sex cells?
What are gametes?
State the advantages of sexual reproduction over asexual reproduction.
Give reason for the following:
The parents and off-springs of organisms reproducing sexually have the same number of chromosomes.
What would be the ratio of chromosome number between an egg and its zygote?
One of the following process does not lead to the formation of clones. This is :
(a) fission
(b) fertilisation
(c) fragmentation
(d) tissue culture
What is the function of uterus?
Define the term Metamorphosis.
Name the organ involved in the following:
Passing of sperms from a man to a woman.
Explain why variations are observed in the offsprings of sexually reproducing organisms?
What are seasonal breeders? Give an example.
Answer in one sentence.
Outline the path of sperm upto the urethra.
Answer in one sentence.
Name the endocrine glands involved in maintaining the sex characteristics of males.
Explain the histological structure of testis.
Which of the following is the male accessory gland?
Match column -1 with column - II and select the correct option.
| Column - I | Column - II | ||
| 1. | Seminal vesicles | a. | Membranous urethra |
| 2. | Scrotum | b. | Thermoregulatory |
| 3. | Tunica vaginalis | c. | Fibro muscular pouches |
| 4. | Cowper's gland | d. | Peritoneal covering |
Oestrus cycle is seen in ______.
Which is a better mode of reproduction, sexual or asexual? Why?
