A cross involving one gene between two heterozygous parents is called a(n) ________

Fill in the blank(s) with correct word


monohybrid cross

Biology & Microbiology

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Answer the following statements true (T) or false (F)

1. A time of great adaptive radiation for mammals occurred during the Tertiary period. 2. The coding region of chimpanzee genes and human genes are 99% identical. 3. According to the evolutionary tree, humans share a common ancestor with other groups of apes. 4. According to Marjorie Weber and Anurag Agrawal research, a relatively young plant family with many species would have a low diversification rate; and an old plant family with just a few species would have a high diversification rate.

Biology & Microbiology

Based on figure 16.15, which of the following best explains why toxic shock syndrome peaked in the early 1980s?

a. Some strains of S. aureus developed resistance to methicillin. b. The drug methicillin was invented in the 1980s c. A single strain of S. aureus was responsible for the toxic shock syndrome, and women could not develop immunity to this strain d. Some strains of S. aureus were able to adapt to the new environment produced by ultra-high-absorbency tampons

Biology & Microbiology

The synaptonemal complex is  

A.  a cluster of microtubules at each pole of the cell. B.  a network of microtubules that forms the spindle apparatus. C.  a network of proteins that holds homologues together. D.  the area where microtubules attach to the centromere of each chromosome. E.  a region of highly coiled DNA.

Biology & Microbiology

DDT was once considered a "silver bullet" that would permanently eradicate insect pests. Today, instead, DDT is largely useless against many insects. Which of these would have been required for this pest eradication effort to be successful in the long run?

A. Larger doses of DDT should have been applied. B. None of the individual insects should have possessed genomes that made them resistant to DDT. C. The frequency of DDT application should have been higher. D. All habitats should have received applications of DDT at about the same time. E. DDT application should have been continual.

Biology & Microbiology