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संबंधित प्रश्न
Why did T. H. Morgan select Drosophila melanogaster to study sex linked genes for his lab experiments ?
With the help of a chart, explain the method of sex determination in honeybees.
Short Answer Question.
“Father is responsible for determination of sex of child and not the mother”. Justify.
Explain the mechanism of sex determination in birds.
Explain the mechanism of sex determination in humans with a suitable chart.
What is haplodiploidy?
Diploid larvae which get royal jelly as food develops into ____________ and other develops into workers (sterile females).
Select the statements that describe characteristics of genes
- genes are specific sequence of bases in a DNA molecule
- a gene does not code for proteins
- in individuals of a given species, a specific gene is located on a particular chromosome
- each chromosome has only one gene
All human chromosomes ate not paired. Most human chromosomes have a maternal and a paternal copy, and we have 22 such pairs. But one pair called the sex chromosomes, is odd in not always being a perfect pair. Women have a perfect pair of sex chromosomes. But men have a mismatched pair in which one is normal sized while the other is a short one.
(a) In humans, how many chromosomes are present in a Zygote and in each gamete?
(b) A few reptiles rely entirely on environmental cues for sex determination. Comment.
(c) "The sex of a child is a matter of chance and none of the parents are considered to be responsible for it." Justify it through flow chart only.
OR
(c) Why do all the gametes formed in human females have an X chromosome?
In the haplodiploidy system observed in honeybees, unfertilized eggs develop into which type of individual?
