Practice Questions

TLS Online TPP Program

#Question id: 7124

Neural crest cells that follow a dorso-lateral route of migration under the skin will become melanocytes; how is their differentiation into melanocytes triggered during their migration?

#Unit 5. Developmental Biology

The neural crest cells are already determined to become melanocytes before they leave the neural tube
N-cadherin and E-cadherin are lost from the neural crest cells when they initiate their migration, and this signals the cells to become melanocytes.
BMP and noggin control the fate of neural crest cells.
The cells in the skin express a ligand (stem cell factor, SCF, also known as Steel) on their surface, which interacts with a receptor (Kit, also known as white spotting) on the surface of the neural crest derived cells; this interaction triggers their differentiation as melanocytes.

More Questions

TLS Online TPP Program

#Question id: 10767

#Unit 8. Inheritance Biology

Chi square test is used to verify

TLS Online TPP Program

#Question id: 10768

#Unit 8. Inheritance Biology

Dihybrid test cross genotypic and phenotypic ratio is

TLS Online TPP Program

#Question id: 10769

#Unit 8. Inheritance Biology

In merabilis jalapa plant red plant RR Cross with white plant rr. In F1 generation the phenotype obtained was Rr Pink. Which type of cross it is

TLS Online TPP Program

#Question id: 10770

#Unit 8. Inheritance Biology

Both the allele A and B independently express in heterozygous condition are known as

TLS Online TPP Program

#Question id: 10771

#Unit 8. Inheritance Biology

What is penetrance?

A- % of individuals having phenotype according to their genotype.

B- Penetrance refers to the likelihood that a clinical condition will occur when a particular genotype is absent.

C- 100% expressivity always gives 100% penetrance.

which one of the correct combination-

TLS Online TPP Program

#Question id: 10772

#Unit 8. Inheritance Biology

In an experiment plant RR round genotype have 100 seeds. In F1 generation 70 seeds are round and 30 seeds are wrinkled. So what will be

the penetrance value for round seeds?