Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 19467
TLS Online TPP Program

#Question id: 4761

which of the following statements about a lethal allele is not correct?

#XL - R Botany

  1. lethal alleles are always recessive.

  2. lethal alleles may have a late age of onset.

  3. lethal alleles may be caused by mutations in essential genes.

  4. lethal alleles may affect one individual differently than another

More Questions
TLS Online TPP Program

#Question id: 5086

#XL - T Zoology

Cells move to new positions as an embryo establishes its three germ tissue layers during ________.
TLS Online TPP Program

#Question id: 919

#XL - Q Biochemistry

Carnitine is:
TLS Online TPP Program

#Question id: 2668

#XL - T Zoology

The toxic shock syndrome toxin is produced by some Salmonella species when there is not sufficient iron present. When iron is present, it prevents transcription of the TSS-toxin gene. Iron therefore serves as __________.
TLS Online TPP Program

#Question id: 1716

#XL - Q Biochemistry

Expression of a CD8 α-α homodimer is characteristic of:
TLS Online TPP Program

#Question id: 4619

#XL - S Microbiology

Within six months of effectively using methicillin to treat S. aureus infections in a community, all new S.aureus infections were caused by MRSA. How can this best be explained?