Mitosis is the process by which
A.) microtubules are assembled
B.) cytoplasm is divided
C.) the nucleus is divided into two nuclei
D.) the cell rests
Ans: C.) the nucleus is divided into two nuclei
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What is the correct order of general transcription factor assembly at an RNA polymerase II promoter?
A. TFIIB, TFIID, TFIIF, TFIIH B. TFIIB, TFIIH, TFIID, TFIIF C. TFIID, TFIIB, TFIIF, TFIIH D. TFIID, TFIIF, TFIIH, TFIIB E. TFIIF, TFIIB, TFIID, TFIIH
Newly hatched goslings follow any large moving
objects to which they are exposed shortly after hatching. This behavior is an example of a. homing. b. imprinting. c. piloting. d. migration. e. classical conditioning.
If a trait is X-linked dominant, who would express the trait?
A) females homozygous for the dominant allele and males hemizygous for the recessive allele B) heterozygous females and males hemizygous for the dominant allele C) females homozygous for the recessive allele and males hemizygous for the recessive allele D) females homozygous for the recessive allele and males hemizygous for the dominant allele E) significantly more females than males
In birds, sex is determined by a ZW chromosome scheme. Males are ZZ and females are ZW. A recessive lethal allele that causes death of the embryo is sometimes present on the Z chromosome in pigeons
What would be the sex ratio in the offspring of a cross between a male that is heterozygous for the lethal allele and a normal female? A) 2:1 male to female B) 1:2 male to female C) 1:1 male to female D) 3:1 male to female