Free Principles Of Inheritance And Variation (Daily Quiz: 14) NEET Biology Questions & Answers with Detailed Explanation & Full Review

Question-1

In Antirrhinum two plants with pink flowers were hybridized. The $F_{1}$ plants produced red, pink and white flowers in the proportion of 1 red, 2 pink and 1 white. What could be the genotype of the two plants used for hybridization ? Red flower colour is determined by RR, and white by rr genes

(a) rr

(b) Rr

(c) RR

(d) rrrr

Question-2

Find out the incorrect statement.

(a) Sturtevant used the frequency of recombination between gene pairs on the same chromosome as a measure of the distance between genes and mapped their position on chromosome.

(b) Morgan carried out several dihybrid crosses in drosophila to study the genes that were sex linked.

(c) Henking gave the term X-body.

(d) Boveri united the knowledge of chromosomal segregation with Mendelian principles and called it the chromosomal theory of inheritance.

Question-3

Test cross involves

(a) crossing the $F_{1}$ hybrid with a double recessive genotype

(b) crossing between two $F_{1}$ hybrids

(c) crossing between two genotypes with dominant trait

(d) crossing between two genotypes with recessive trait

Question-4

In Huntington’s disease, the unaffected persons are homozygous for normal allele h. The following is erroneous because

(a) Either person 6 or 7 should have the disease, if individual11 shows the disease.

(b) It shows both male and female affected by Huntingtons' disease

(c) At least one of the 2 children (8, 9) should have the disease

(d) All of these

Question-5

Match column-I with their name given in column-II and choose the correct answer.

Column -I	Column -II
A. Alfred Sturtevant	I. Mapped position of genes
B. Henking	II. X-body
C. Meischer	III. Nuclein
D. Morgan	IV. Dihybrid crosses in Drosophila

Codes:

(a) A – I, B – II, C – III, D – IV

(b) A – I, B – III, C – IV, D – II

(c) A – IV, B – I, C – II, D – III

(d) A – III, B – II, C – IV, D – I