Which one of the following conditions correctly describes the manner of determining the sex in the given samples?

XO type of sex chromosomes determine male sex in grasshopper

XO condition in humans as found in Turner syndrome determines female sex

Homozygous sex chromosomes (XX) produce male in Drosophila

Homozygous sex chromosomes (ZZ) determine female sex in birds

Solution

XO type of sex chromosomes determine male sex in grasshopper

Grasshopper is an example of XO type of sex determination in which the males have only one X - chromosome besides the autosomes, whereas females have a pair of X - chromosomes.

Some More Questions From Principles of Inheritance and Variation Chapter

Mention the phenomenon of pleiotropy by giving an example.

Name the plant that shows incomplete dominance in respect of the colour of its flower.

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Principles Of Inheritance And Variation

Some More Questions From Principles of Inheritance and Variation Chapter

Mention the phenomenon of pleiotropy by giving an example.

Name the plant that shows incomplete dominance in respect of the colour of its flower.

Write the genotypes of man with blood group A.

What is Mendel’s monohybrid phenotypic ratio ?

Write down Mendel’s dihybrid Phenotypic ratio

Who were the rediscoverers of Mendelism ?

What are the real determinants of what an organism will become ?

What is the unique feature of F1 generation ?

What will be the genetic make up of an organism which suffers from sickle cell anaemia ?

What do the symbols square and circle in a pedigree chart indicate ?

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