B
What do we mean when we use the terms monohybrid cross and dihybrid
cross?
A) A monohybrid cross involves a single parent, whereas a
dihybrid cross involves two parents.
B) A dihybrid cross involves
organisms that are heterozygous for two characters that are being
studied, and a monohybrid cross involves organisms that are
heterozygous for only one character being studied.
C) A
monohybrid cross is performed for one generation, whereas a dihybrid
cross is performed for two generations.
D) A monohybrid cross
results in a 9:3:3:1 ratio whereas a dihybrid cross gives a 3:1ratio.
What was the most significant conclusion that Gregor Mendel drew from
his experiments with pea
plants?
A) There is considerable
genetic variation in garden peas.
B) Traits are inherited in
discrete units and are not the results of
"blending."
C) Recessive genes occur more frequently in
the F1 generation than do dominant ones.
D) Genes are composed of DNA.