Which of the following phrases INCORRECTLY completes the following statement? The Hox complexes of mammals
A. encode genes homologous to those found in the antennapedia and bithorax complexes.
B. are located on a single chromosome, similar to what is seen in Drosophila.
C. follow the colinearity rule.
D. determine cell fate on the anteroposterior axis.
E. suggest there is a basic body plan that is followed by all multicellular organisms.
Answer: B
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Which is part of the uterine adnexa
A) Cervix B) Labia C) Fallopian tube D) Vagina.
The inheritance pattern in which the mother provides gene products to the developing egg cells is called
A. X inactivation. B. extranuclear inheritance. C. genomic imprinting. D. linkage. E. maternal inheritance.
Congenital deafness in humans is due to the
homozygous condition of either of the recessive genes d or e, or both of these genes. Both dominant D and E are necessary for normal hearing. Gene D/d affects the middle ear, while gene E/e affects the inner ear. It does not matter how good the normal inner ear (as indicated by E__) is; if there is something wrong in the middle ear, the individual is unable to hear. The same applies for the other gene. Give the phenotypic results of the following crosses: (a) Dd EE x Dd EE (b) Dd Ee x Dd Ee (c) dd EE x DD ee (d) Dd EE x Dd ee (e) Dd EE x DD Ee What will be an ideal response?
What is the relationship between mobile genetic elements and DNA methylation?
A) DNA methylation is considered to be a defense against the spread of mobile genetic elements because it prevents transcription. B) DNA methylation is reduced in regions of the genome associated with mobile genetic elements because methylation only targets protein-coding genes. C) DNA methylation prevents RNA interference and therefore allows mobile genetic elements to spread. D) DNA methylation is a form of post-transcriptional silencing of mobile genetic elements.