In a hypothetical population of 1,000 people, there is a hypothetical trait called pink toe. People who are homozygous dominant have red toes, those who are homozygous recessive have white toes, and those who are heterozygous have pink toes. If 400 people have red toes, the number of people with pink toes is _____________________
Fill in the blank(s) with correct word
466
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The G + C content of a DNA sample can be estimated from its melting temperature.
Answer the following statement true (T) or false (F)
Mature vessel elements:a
form sieve tubes in the vascular tissue. b. have pits in their walls, which allow water to be transported laterally. c. are alive and contain cytoplasm. d. are given support by companion cells. e. occur in pairs, forming stomata in the epidermis.
Consider the cell cycle of a human cell. During G2, what is the state of the homologous chromosomes?
A. The homologous chromosomes have not been replicated yet. B. The homologous chromosomes are now in the haploid or n condition. C. The homologous chromosomes have been pulled to their respective poles by the spindle apparatus. D. The homologous chromosomes have all been copied through DNA replication and are beginning to condense. E. The homologous chromosomes are lined up on the equator of the cell.
Hormones produced by the testes control the expression of traits for
A. hair color and eye color B. beard development and number of fingers C. hair color and voice quality D. voice quality and beard development