101. Most genetic disorders of humans are caused by A. multiple alleles.B. recessive alleles.C. drinking during pregnancy.D. a mutation that occurs in the egg, sperm, or zygote.E. dominant alleles. 102. The vast majority of people afflicted with recessive disorders are born to parents who were 103. Which of the following statements best explains why dominant alleles that cause lethal disorders are less common than recessive alleles that cause lethal disorders? 104. Which of the following terms refers to a situation where a single phenotypic character is determined by the additive effects of two or more genes?
105. The individual features of all organisms are the result of A. genetics.B. the environment.C. genetics and cytoplasmic determinants.D. the environment and individual needs.E. genetics and the environment. 106. The chromosome theory of inheritance states that 107. Genes located close together on the same chromosomes are referred to as ________ genes and generally ________.
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- Reproduction, d., E., A. Prophase II