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TLS Online TPP Program

#Question id: 15007

You set up a cross between true breeding wild type male fruit flies and true breeding female flies with a yellow body color. You notice in the F1 generation that half the flies, specifically all the males, have yellow body color while the females are wild type (gray). Which of the following explanations is the most likely?

#SCPH12 I Genetics
  1. Some of your females had already mated with yellow males before you collected them.
  2. Some of your parental flies must have had a new mutation in their germ cells.
  3. The mutation which causes yellow body color is on the X chromosome.
  4. The mutation which causes yellow body color is on the Y chromosome.
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TLS Online TPP Program

#Question id: 667

#SCPH28 | Zoology

Which represents the backbone of a protein?

Note: R = amino acid side chain

N = nitrogen

Cα = alpha carbon

C = carbonyl carbon
TLS Online TPP Program

#Question id: 7014

#SCPH01 Biochemistry

Microglia are often considered the “immune cells” of the central nervous system, since they function:
TLS Online TPP Program

#Question id: 5766

#SCPH28 | Zoology

Turner syndrome in humans is caused by which chromosomal conditions?
TLS Online TPP Program

#Question id: 3290

#SCPH28 | Zoology

Dog breeders maintain the purity of breeds by keeping dogs of different breeds apart when they are fertile. This kind of isolation is most similar to which of the following reproductive isolating mechanisms?
TLS Online TPP Program

#Question id: 4126

#SCPH05 I Biotechnology

Which one of the following is true about the genetic code?