TLS Online TPP Program

#Question id: 7149


What role, if any, do Hox genes play in specification of neuronal fate?

#Unit 5. Developmental Biology
  1. Different Hox genes are activated along the dorso-ventral axis by the gradient of Shh.
  2. Different combinations of Hox genes specify the identities of neurons along the antero-posterior axis
  3. Hox genes determine the identity of the segments along the axis of the vertebrate spinal cord
  4. Hox genes determine the different subtypes of neurons that form along the dorso-ventral axis.
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TLS Online TPP Program

#Question id: 4798

#Unit 8. Inheritance Biology

In goats, a beard is produced by an autosomal allele that is dominant in males and recessive in females. We’ll use the symbol Bb for the beard allele and B for the beardless allele. Another independently assorting autosomal allele that produces a black coat (W) is dominant over the allele for white coat (w). A cross allowed between BBbWw (male) X BBbWw (female). What is proportional of female progeny will beard with black coat?

TLS Online TPP Program

#Question id: 4799

#Unit 8. Inheritance Biology

You set up a mapping cross involving your favorite gene (YFG) in Neurospora and determine the following octad types: 4:4 arrangement 83; 2:4:2 arrangement 7; 2:2:2:2 arrangement 10. What is the distance between your gene and the centromere?

TLS Online TPP Program

#Question id: 4800

#Unit 8. Inheritance Biology

You set up a mapping cross involving two genes of interest in Saccharomyces and determine the following tetrad types: 8 nonparentalditype; 12 tetratype; 80 parental ditype. Calculate the most accurate map distance between these two genes.

TLS Online TPP Program

#Question id: 4801

#Unit 8. Inheritance Biology

You set up a mapping cross involving two genes in Aspergillus and determine the following percentages of tetrad types: parental ditype 51%, nonparentalditype 49%. What can you say about your genes?

TLS Online TPP Program

#Question id: 4802

#Unit 8. Inheritance Biology

Why is tetrad analysis useful for studying genetics?

TLS Online TPP Program

#Question id: 4803

#Unit 8. Inheritance Biology

Linked genes: