The most accurate description of an organism with genotype AaBb is
A. homozygous dominant.
B. heterozygous.
C. heterozygous dominant.
D. homozygous recessive.
E. heterozygous recessive.
Answer: B
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Double fertilization refers to
a. fusion of two sperm nuclei and two egg cells. b. fusion of one sperm nucleus with two polar nuclei and fusion of another with the egg cell nucleus. c. maturation of the ovary into a fruit. d. none of the above.
The defining characteristic of a desert is the high temperature
Indicate whether the statement is true or false
Where do transcriptional regulators most commonly bind to?
a. major grooves in dsDNA b. minor grooves in dsDNA c. primary supercoils d. promoter sequences
The development of normal maternal behavior in female mice depends on interactions between the female and her young and the presence of a gene called fosB. In mice with functional fosB genes, a sequence of events occurs after babies are born.Arrange the events in their normal sequence following the birth of baby mice for a wild-type female.____ The gene fosB is activated, producing protein that activates other genes.____ Auditory, olfactory, and tactile signals about the young are sent to the hypothalamus.____ Female crouches over young and retrieves them if they leave the nest.____ Female inspects newborns.____ Neural circuitry within the hypothalamus is modified, facilitating maternal behavior.
What will be an ideal response?