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Genes located very close to one another on same chromosome tend to be transmitted together and are called as

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Important Questions on Principles of Inheritance and Variation

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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 28 - Principles of Inheritance and Variation>MCQS CORNER>Q 53
True-breeding red-eyed Drosophila flies with plain thoraxes were crossed with pink-eyed flies with striped thoraxes.
Red eyeplain thorax ×Pink eyestriped thorax
The F1 flies were then test crossed against the double recessive.
The following F2 generation resulted from the cross:
80 16 12 92
Red-eye Red-eye Pink eye Pink eye
Plain thorax Striped thorax Plain thorax Striped thorax

What percentage number of recombinants resulted from the test cross?
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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 28 - Principles of Inheritance and Variation>MCQS CORNER>Q 54
Depending upon the distance between any two genes which is inversely proportional to the strength of linkage, cross overs will vary from
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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 28 - Principles of Inheritance and Variation>MCQS CORNER>Q 55
Refer to the given figure of cross A and cross B and select the correct statement regarding them.
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Note: (+) sign in superscript represents dominant wild type alleles
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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 28 - Principles of Inheritance and Variation>MCQS CORNER>Q 56
What is true about the crossing over between linked genes?
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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 28 - Principles of Inheritance and Variation>MCQS CORNER>Q 57
Chromosome maps/ genetic maps were first prepared by
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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 28 - Principles of Inheritance and Variation>MCQS CORNER>Q 58
The distance between the genes is measured by
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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 28 - Principles of Inheritance and Variation>MCQS CORNER>Q 59
If map distance between genes P and Q is 4 units, between P and R is 11 units, and between Q and R is 7 units, the order of genes on the linkage map can be traced as follows:
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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 28 - Principles of Inheritance and Variation>MCQS CORNER>Q 60
Given diagram shows a pair of homologous chromosomes during meiosis.
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Maximum crossing over will occur between genes