The fitness of a genotype is higher when it is rare in a population. Which of the following types of selection is most likely operating?

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#Question id: 10381

#Unit 6. System Physiology – Plant

symbiosis receptor-like kinase (SYMRK) is another type of receptor involves several function. Which of the following is incorrect?

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#Question id: 19844

#Unit 13. Methods in Biology

Match the following column, which correctly represent the qPCR done by three methods and measure such as;

COLUMN I	COLUMN II
A) SYBR green	i) Annealing
B) Taqman Assay	ii) Denaturation
C) Molecular beacon	iii) pH
	iv) Amplification
	v) Extension

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#Question id: 5104

#Unit 5. Developmental Biology

 In humans, identical twins are possible because ________.

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#Question id: 15461

#Unit 2. Cellular Organization

When doing experiments with bacteria,

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#Question id: 16140

#Unit 13. Methods in Biology

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?