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NEET Exam  >  NEET Tests  >  Biology Class 12  >   Test: Inheritance of Two Genes - NEET MCQ

Test: Inheritance of Two Genes - NEET MCQ


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5 Questions MCQ Test Biology Class 12 - Test: Inheritance of Two Genes

Test: Inheritance of Two Genes for NEET 2024 is part of Biology Class 12 preparation. The Test: Inheritance of Two Genes questions and answers have been prepared according to the NEET exam syllabus.The Test: Inheritance of Two Genes MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Inheritance of Two Genes below.
Solutions of Test: Inheritance of Two Genes questions in English are available as part of our Biology Class 12 for NEET & Test: Inheritance of Two Genes solutions in Hindi for Biology Class 12 course. Download more important topics, notes, lectures and mock test series for NEET Exam by signing up for free. Attempt Test: Inheritance of Two Genes | 5 questions in 5 minutes | Mock test for NEET preparation | Free important questions MCQ to study Biology Class 12 for NEET Exam | Download free PDF with solutions
Test: Inheritance of Two Genes - Question 1
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In Mendel's experiments with garden pea, round seed shape (RR) was dominant over wrinkled seeds (rr), and yellow cotyledon (YY) was dominant over green cotyledon (yy). What are the expected phenotypes in the F2 generation of the cross RRYY x rryy?

Detailed Solution for Test: Inheritance of Two Genes - Question 1
The cross RRYY x rryy produces F1 offspring that are all RrYy (round seeds with yellow cotyledons). In the F2 generation, the dihybrid cross RrYy x RrYy will result in a phenotypic ratio of 9:3:3:1. This ratio includes round seeds with yellow cotyledons (9/16) and wrinkled seeds with yellow cotyledons (3/16). Therefore, both phenotypes are present in the F2 generation.
Test: Inheritance of Two Genes - Question 2
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In a plant, red fruit (R) is dominant over yellow fruit (r) and tallness (T) is dominant over shortness (t). If a plant with RRTT genotype is crossed with a plant that is rrtt, then:

Detailed Solution for Test: Inheritance of Two Genes - Question 2
The RRTT plant will produce only gametes with RT, and the rrtt plant will produce gametes with rt. The resulting F1 generation will all have the genotype RrTt and will exhibit the dominant traits for both characteristics: tallness and red fruit. Therefore, all offspring will be tall with red fruit.
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Test: Inheritance of Two Genes - Question 3
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Which one of the following traits is only expressed in the presence of identical alleles?

Detailed Solution for Test: Inheritance of Two Genes - Question 3
In Mendelian genetics, traits like green seed color are recessive and are expressed only when the individual has two identical recessive alleles (yy). Hence, the green seed trait is only expressed in the presence of identical alleles.
Test: Inheritance of Two Genes - Question 4
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‘When two pairs of traits are combined in a hybrid, segregation of one pair of characters is independent of the other pair of characters’. This is the statement of:
Detailed Solution for Test: Inheritance of Two Genes - Question 4
The Law of Independent Assortment states that the segregation of one pair of alleles for a trait is independent of the segregation of another pair of alleles for a different trait during gamete formation.
Test: Inheritance of Two Genes - Question 5
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In a test cross involving F1 dihybrid flies, more parental-type offspring were produced than the recombinant-type offspring. This indicates:
Detailed Solution for Test: Inheritance of Two Genes - Question 5
When more parental-type offspring are produced than recombinant-type offspring in a test cross, it indicates that the two genes are linked and present on the same chromosome. This linkage reduces the frequency of recombination between them.
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