Are dominant alleles always expressed in the phenotype?
a. Yes
b. No
a
You might also like to view...
Substances called ________ donate hydrogen ions as they dissolve in water, lowering the pH of the solution
a. acids b. bases c. solvents d. salts
The organisms that occupy the first trophic level near hydrothermal vents are:
a. detritivores b. chemoautotrophic bacteria c. decomposers d. photosynthetic bacteria e. photosynthetic algae
Which statement is true?
a. The anterior pituitary gland is essentially nervous tissue. b. The anterior pituitary gland secretes only two hormones. c. Only the posterior part of the pituitary gland could be called the "master gland." d. The posterior pituitary gland only stores hormones produced by the hypothalamus. e. The anterior pituitary gland is conencted to the hpothalamus via the infindibulum.
Before the time of Gregor Mendel and genetics, sexual reproduction was thought to produce a blending or equal mixing of the parents' traits. Today we know that
A. offspring will be identical to one another and demonstrate traits exactly halfway between the parents' traits. B. offspring can vary from receiving over 99% of one parent's genes to receiving over 99% of the other parent's genes. C. offspring inherit essentially 50% of their genes from each parent, but two sibling offspring may share with each other from zero to 23 chromosomes in common from each parent, and further variation may occur due to crossing-over. D. offspring inherit copies of the same 23 pair of chromosomes from each of their parents but the rate of crossing-over makes them very dissimilar. E. there is one chance in 23 of getting identical sets of chromosomes from one parent, times two because there are two parents; therefore, two siblings out of every 46 are really identical except for crossing-over.