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TLS Online TPP Program

#Question id: 7226

Experimental evidences suggest that control of proximal-distal specification of the limb is correlated with the age of the progress zone mesenchyme. Match the following experiment (Column I) with their results (Column II).

            Column I

             Column II

A. when an early wing bud progress zone was transplanted to a late wing bud

I. Normal limbs form

B. when a late wing-bud progress zone was transplanted to an early wing bud

II. Lack of intermediate structures

C. when an early wing bud progress zone was transplanted to an early wing bud

III. An extra set of ulna and radius formed

D. when a late wing-bud progress zone was transplanted to a late wing bud

 


#Unit 5. Developmental Biology
  1. A-III, B-II, C-I, D-I
  2. A-I, B-II, C-III, D-I
  3. A-II, B-III, C-II, D-I
  4. A-I, B-I, C-II, D-III
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TLS Online TPP Program

#Question id: 4868

#Unit 8. Inheritance Biology

 A mouse cross C/c . D/d X c/c . d/d is made, and in the progeny there are

45% C/c . d/d, 45% c/c . D/d,

5% c/c . d/d, 5% C/c . D/d

What are distance between C and D gene?
TLS Online TPP Program

#Question id: 4869

#Unit 8. Inheritance Biology

In the plant Arabidopsis, the loci for pod length (L, long; l, short) and fruit hairs (H, hairy; h, smooth) are linked 16 map units apart on the same chromosome. The following crosses were made:

(i) L H/L H X l h/l h = F1

(ii) L h/L h X l H/l H = F1

If the F1’s from (i) and (ii) are crossed, what proportion of the progeny are expected to l h/l h?
TLS Online TPP Program

#Question id: 4870

#Unit 8. Inheritance Biology

Following gene order is for three points. If Genotype +y +ct +v produced actual number of double cross over gamete is 10 out of total 1000. What is interference value?
TLS Online TPP Program

#Question id: 4871

#Unit 8. Inheritance Biology

In a testcross of an individual heterozygous for each of three linked genes, the most frequent classes of progeny were A B c/a b c and a b C/a b c, and the least frequent classes were A B C/a b c and a b c/a b c. what is the order of the genes?
TLS Online TPP Program

#Question id: 4872

#Unit 8. Inheritance Biology

F1 heterozygous females are test-crossed with males and produced 1800 progeny The interference between these genes is 0.4. What number is of observe double cross over? 
TLS Online TPP Program

#Question id: 4873

#Unit 8. Inheritance Biology

Six bands in a salivary gland chromosome of Drosophila are shown in the following figure, along with the extent of five deletions (Del 1 to Del 5)