The question refers to the following table, which compares the percent sequence homology of four different parts (two introns and two exons) of a gene that is found in five different eukaryotic species. Each part is numbered to indicate its distance from the promoter (for example, Intron I is the one closest to the promoter). The data reported for species A were obtained by comparing DNA from one member of species A to another member of species A.

Regarding these sequence homology data, the principle of maximum parsimony would be applicable in ________.

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#Question id: 16140

#SCPH06 I Botany

Many mouse genes are “tissue-specific,” that is, they are present throughout the body but are expressed in only one of the animal’s many tissue types. (Other mouse genes are expressed throughout the body, or in multiple tissues.) Geneticists can study the regulation of a mouse gene by fusing the gene’s promoter region to the LacZ coding sequence and injecting the construct to create a transgenic mouse. Fusion of the mouse amylase promoter to LacZ yielded a Pamylase-LacZ construct.

You are surprised to observe that mice homozygous for the transgene insertion display a serious heart defect. (Heterozygotes have normal hearts.) which one is a  possible explanation?

a) LacZ overexpression (with two copies of the transgene) causes the defect.

b) the insertion disrupted a gene that is haploinsufficient.

c) the insertion disrupted a gene that is haplosufficient.

d) LacZ expression inhibition (with two copies of the transgene) causes the defect.

Which of the following statements is correct  predict about the  heart defect?

TLS Online TPP Program

#Question id: 16311

#I Life Science/ Life Sciences Group – I-V

What is stress?

TLS Online TPP Program

#Question id: 16311

#SCPH28 | Zoology

What is stress?

TLS Online TPP Program

#Question id: 16312

#I Life Science/ Life Sciences Group – I-V

Any situation that is out of the ordinary, known as:

TLS Online TPP Program

#Question id: 16312

#SCPH28 | Zoology

Any situation that is out of the ordinary, known as:

TLS Online TPP Program

#Question id: 16313

#I Life Science/ Life Sciences Group – I-V

Stress in small amounts: