You observe a pine with two distinctly different types of cones. The best explanation for this is
A. the tree was produced by grafting.
B. a mutation has occurred in this plant.
C. one cone is the male reproductive structure and the other is the female reproductive structure.
D. one cone is a gametophyte and the other is a sporophyte.
C. one cone is the male reproductive structure and the other is the female reproductive structure.
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Calculate the narrow-sense heritability of height between aunts and neices if the observed phenotypic correlation coefficient is 0.1
A. 0.4 B. 2.5 C. 4 D. 0.25
Answer the following statements true (T) or false (F)
1. All enzymes are proteins. 2. Because of the abundance of ribosomes, translation is NOT an energy costly process for the cell. 3. The cells of every organism make only a few different tRNA molecules encoded by the same gene. 4. In eukaryotes, the 40S and 60S subunits combine to form a 100S ribosome.
A man and woman are each heterozygous for the autosomal recessive gene for albinism. They already
have two non-albino children and want to have two more. What is the probability that their next two children will be phenotypically identical to each other with regard to skin color (i.e., either both albino or neither albino)?
a. 1/16 b. 3/16 c. 4/16 d. 9/16 e. 10/16
Refer to the accompanying figure. Reabsorption of solutes with nutritional value occurs at the point labeled as:
a. 1. b. 3. c. 5. d. 6. e. 9.