In poodles, black is dominant to white. A black poodle is crossed with a white poodle. In a litter of four, all of the puppies are black. What is the best conclusion（）
A. The black poodle is probably homozygous
B. The black poodle is definitely homozygous
C. The black poodle is definitely heterozygous
D. The black poodle is probably heterozygous
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What process is unique to plants（）
A. double fertilization
B. meiosis
C. crossing ove
D. haploid gametes
E. spermatogenesis
In order to be functional, a eukaryotic chromosome requires all of the following except（）
A. a nucleoid.
B. a centromere
C. origins of replication
D. telomeres
Which of the following scientists contributed significantly to the foundations of transmission genetics（）
A. Thomas Hunt Morgan
B. James Watson
C. John B. S. Haldane
D. Charles Darwin
The contribution Charles Darwin made to genetics was to（）
A. propose that evolution occurs by natural selection
B. demonstrate the connection between Mendel’s principles of inheritance and evolution
C. develop the theory of evolution, based on earlier theories of population genetics
D. connect the fields of evolution and molecular genetics
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