TLS Online TPP Program

#Question id: 11145


Two fundamental concepts about the ion channels of a "resting" neuron are that the channels ________.

#SCPH28 | Zoology
  1. are always open, but the concentration gradients of ions frequently change
  2. are always closed, but ions move closer to the channels during excitation
  3. are open or closed depending on their type, and are specific as to which ion can traverse them
  4. open in response to stimuli, and then close simultaneously, in unison
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TLS Online TPP Program

#Question id: 5348

#SCPH28 | Zoology

Miniature wings (Xm) in Drosophila result from an X-linked allele that is recessive to the allele for long wings (XL). Following different cross with resulting progeny were possible

Male parent

Female parent

Heterozygous

Male offspring

Female offspring

Long wings

XLY

Long wing

XL Xm

       A

B

Miniature wings

XmY

Long wing

XL Xm

C

D

Which of the following above offspring is not possible to carry miniature wings?

TLS Online TPP Program

#Question id: 5349

#SCPH28 | Zoology

The following is the inheritance pattern of a trait under observation:

(i) The trait often follow cris cross inheritance 

(iii) Unaffected father born to affected daughter

The trait is likely to be

TLS Online TPP Program

#Question id: 5350

#SCPH28 | Zoology

Which of the following most probable mode of genetic disorder?

TLS Online TPP Program

#Question id: 5351

#SCPH28 | Zoology

Consider the accompanying pedigree of a rare autosomal recessive disease, PKU. (Assume individual coming from outside that is homozygous for normal allele) What is the probability of child showing trait of A and B individuals?

TLS Online TPP Program

#Question id: 5352

#SCPH28 | Zoology

Marriage occurs between individuals III-3 and III-6, what is the probability couple; son would be affected with the trait?

TLS Online TPP Program

#Question id: 5423

#SCPH06 I Botany

Maximum height of plant is 200 cm and minimum average height is 80cm. if plant height is controle by 5 pairs of polygene, which of the following plant exhibit average phenotype?