Answer the following questions in reference to the five items listed below.
A.
B. The normal sperm cell of species X carries 11 chromosomes. Following nondisjunction in the formation of secondary spermatocytes and their subsequent fertilization of normal ova, some of the zygotes will have 21 chromosomes, and the remainder will have how many chromosomes?
C. How many chromosomes are present in each cell of the germ cell line for a tetraploid species whose diploid complement of chromosomes is 48?
D. Following a gene duplication event involving only five loci, how many chromosomes will a human female have?
E. How many chromosomes does each somatic cell have in a human male who has two X chromosomes?
F. How many chromosomes are present in the somatic cells of a child born with Down syndrome (trisomy 21)?
A. 12
B. 23
C. 24
D. 46
E. 47
F. 47
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Answer the question using the accompanying figure. The structure labeled "E" is formed ____
a. under favorable conditions b. under unfavorable conditions c. by mitosis d. by meiosis e. by fusion of individual cells
Fruit develops from the
A. anther. B. ovary. C. stems. D. stigma. E. leaves.
The nitrogenous bases of DNA stores genetic information. Indicate whether the statement is true or false
Refer to the accompanying figure. The type of neuron labeled as 1 is a(n):
a. motor neuron. b. pyramidal neuron. c. sensory neuron. d. efferent neuron. e. interneuron.