TLS Online TPP Program

#Question id: 7211


Choose the correct match.

Germ layers specifying signals

                             Result

a.     If either Nodal or Vg1 signaling is blocked

i.               No ectoderm induction

b.     If vegT mRNA depleted

ii.              No endoderm induction

c.     If smad2 phosphorylation inhibited

iii.            No mesoderm induction

 

iv.            Ectoderm only

#Unit 5. Developmental Biology
  1. a-iii, b-ii, iii, iv, c-iii
  2. a-iii, iv, b-ii, c-iii, iv
  3. a-i, ii, b-ii, iii, c-iv
  4. a-ii, b-i, iii, c-iv
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TLS Online TPP Program

#Question id: 14997

#Unit 8. Inheritance Biology

You capture several interesting insects from a population in your yard. By inbreeding, you develop true breeding strains that differ only in the shape of their wings - one strain has round wings while the other strain has oval wings. How might you demonstrate that Mendel's principles apply to your insects?

TLS Online TPP Program

#Question id: 14998

#Unit 8. Inheritance Biology

You set up a monohybrid cross between true breeding round winged and true breeding oval winged insects. Your F1 offspring have round wings, and you collect the following numbers of F2: Round wings: 302; Oval wings: 86. Which of the following statements is NOT correct?

TLS Online TPP Program

#Question id: 14999

#Unit 8. Inheritance Biology

I know that black coat color in mice is dominant to albino. Black mice get a higher price at the pet store so I am disappointed when I cross a black mouse with an albino mouse and get 6 albino and 2 black mice in the litter. I expected all black. What mistake did I make?

TLS Online TPP Program

#Question id: 15000

#Unit 8. Inheritance Biology

I do a chi square analysis of the offspring from my cross of a black mouse and albino mouse. If the black mouse was heterozygous I should have expected a 1:1 ratio, and I got 6 albino and 2 black mice. What is my chi square value?

TLS Online TPP Program

#Question id: 15001

#Unit 8. Inheritance Biology

You cross true breeding lizards that are either green or albino and discover that all the offspring are striped green and white. Which is the most likely result if you cross two striped lizards?

TLS Online TPP Program

#Question id: 15002

#Unit 8. Inheritance Biology

If you performed a dihybrid cross and found that your results were significantly different from the 9:3:3:1 ratio, what would you suspect?