Which of the following pair is wrongly matched?

1.  Factors   -   Discrete units

2.  Multiple alleles  -  ABO blood group

3.  Female Drosophila  -  Heterogametic

4.  Inborn error   -   Phenylketonuria

 

Morgan observed tight linkage in Drosophila with only 1.3 percent recombination for

1.  White eye and yellow body

2.  Normal wing and yellow body

3.  White eye and miniature wing

4.  Yellow body and miniature wing 

Morgan coined the term recombination to describe 

1.  Physical association of genes on a chromosome

2.  Generation of new traits by mutation

3.  Linkage of two genes on different chromosomes

4.  Generation of non-parental gene combinations 

Which of the following is a non-parental type of progeny obtained by Morgan while carrying out a dihybrid cross?

1.  

2.  

3.  

4.  

What percent of 'ab' type of gamete produced by a pea plant of genotype AaBb?

1. 25%

2. 50%

3. 75%

4. 100%

Mendel published his work on inheritance of characters in 1865 but it remained unrecognised till 1900 because :- 

1. (a), (b) & (c) are correct

2. (c) & (d) are correct

3. (a), (b) & (d) are correct

4. Only (a) is correct

When a violet flower of unknown genotype is crossed with white flower, the progenies are violet and
white in equal proportion. Then read the following statements : 

(i) This is called test cross.
(ii) Unknown flower is homozygous
(iii) Unknown flower is heterozygous
(iv) This test used to determine the phenotype of the plant at F2
(v) In test cross, violet or white flower is crossed with the recessive parent instead of self-crossing.

Select the incorrect statement.

1. iii, iv, v

2. ii, iv

3. i, ii, v

4. ii, iv, v

The unmodified (functioning) allele which represents the original phenotype is the $\underline{ \left(\mathrm{a}\right) }$ allele and the modified allele is $\underline{ \left(\mathrm{b}\right) }$ the $\underline{ \left(\mathrm{c}\right) }$ allele. 

1. (a) Recessive, (b) generally, (c) dominant

2. (a) dominant, (b) always, (c) recessive

3. (a) dominant, (b) generally, (c) recessive

4. (a) recessive, (b) always, (c) dominant

Read the following statements (A-D) : 

Find which are only correct statements?

1. A & D

2. C & D

3. A, B & D

4. All are correct

Match column-I with column-II.

1. a-ii, b-i, c-iii

2. a-ii, b-iii, c-i

3. a-iii, b-ii, c-i

4. a-i, b-iii, c-ii