Doris Taylor’s research group used detergents to remove all the cells from a cadaveric rat heart, which left behind the natural extracellular matrix. Proteins such as fibronectin, collagen, and laminin held together the rest of the extracellular matrix and maintained the intricate shape of the heart. The researchers then infused this extracellular matrix scaffold with cardiomyocyte progenitor cells. Surprisingly, these cells differentiated and organized into a functionally contracting “recellularized” heart. The behavior of extracellular matrix scaffold can promote the differentiation and rebuilding of a beating heart is analogous to which of the interactions?

#Question id: 4864

#Unit 8. Inheritance Biology

Following is a number of different gamete produced by AaBbCc

ABC- 366, abc- 367,   aBc- 109     AbC-105   

aBC-3      Abc -4      ABc- 25     abC-21

What are distance between A and B

#Question id: 4865

#Unit 8. Inheritance Biology

Neurospora strain with genotype Ab was cross to another strain with genotype aB. Following different ascus and their appropriate number given in table.

Which is distance between gene A and Gene B?

#Question id: 4866

#Unit 8. Inheritance Biology

In a certain diploid plant, the three loci A, B, and C are linked as follows: Assuming 100%   interference, if the plant with genotype ABC/abc is test cross, what proportion of the progeny will be of the genotype a b c/a b c?

#Question id: 4867

#Unit 8. Inheritance Biology

A three point test cross was carried out in Drosophila melanogaster involving three adjacent incomplete link genes A, B and C. arranged in the same order. The distance between A to B is 5 map units (mu) and that between B to C is 10 map. If pure line Drosophila AAbbCC crosses with aaBBcc to produce F1 offspring were allowed to cross with aabbcc result in following offspring genotype?

What is a A, B, C respectively?

#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?

#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?