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提问人：网友tianyiww
发布时间：2022-01-07
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The prokaryotes include both the eubacteria and the archaea.
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第1题
The main source of most prestigious universities is federal or state funds in addition to fees
第3题
______ was the keystone of Shelley’s poetic achievement.
A、Prometheus Unbound
B、Childe Harold’s Pilgrimage
C、The Eve of St. Agnes
D、The Revolt of Islam
第7题
Genes come in different versions called:
A、alleles
B、loci
C、genotypes
D、chromosomes
E、genomes
第8题
In Mendel’s peas, yellow seeds are dominant to green. A pure-breeding yellow plant is crossed with a pure-breeding green plant. All of the offspring are yellow. If one of these yellow offspring is crossed with a green plant, what will be the expected proportion of plants with green seeds in the next generation?
A、0%
B、25%
C、50%
D、75%
E、100%
第9题
In Mendel’s peas, purple flower color is dominant to white. From which of the following descriptions can you not infer the genotype for the locus completely?
A、purple
B、white
C、pure-breeding purple
D、heterozygous
第10题
In a cross between pure-breeding tall plants with pure-breeding short plants, all of the F1 are tall. When these plants are allowed to fertilize themselves, the F2 plants occur in a ratio of 3 tall:1 short. Which of the following is not a valid conclusion from these results?
A、The allele that produces the tall condition is dominant to the allele that produces the short condition.
B、The difference between tall and short stature in these lines is controlled by a single gene pair.
C、During production of gametes in F1 plants, the tall and short alleles segregate from each other equally into the gametes.
D、The tall and short traits assort independently of each other in this cross.
E、Fertilization occurs randomly between gametes carrying the tall and short alleles.
