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Principles Of Inheritance And Variation

Question

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In a test cross involving F_{1 di}hybrid flies, more parental-type offspring were produced that the recombinant type offspring. This indicates

chromosomes failed to separate during meiosis

the two genes are linked and present on the same chromosome

both of the characters are controlled by more than one gene

the two genes are located on two different chromosomes

Solution

B.

the two genes are linked and present on the same chromosome

When two genes are linked they are inherited together and result in the increase in the appearance of the parental characters.

Some More Questions From Principles of Inheritance and Variation Chapter

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 ?

Define heterogamy. Give an example.

How many chromosomes are found in human cells ?

Why is male Drosophila regarded as heterogametic ?

What term is used for the two chromatids resulting from the interchange of segments during crossing over ?

What is name of a cross in which a dominant individual is crossed with a recessive parent?

Distinguish between homogametic and heterogametic organisms.

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