Compare and contrast the following pairs of related terms: gene and allele, genotype and phenotype,
homozygous and heterozygous. What will be an ideal response?
Phenotype refers to the physical appearance whereas genotype refers to genetic makeup.
Genes are units of heredity that affect an organism’s traits. Alleles are alternate forms of genes.
Homozygous means that the organism has identical alleles for a trait. Heterozygous describes an
organism with two different alleles for one trait
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By the end of meiosis I of oogenesis, an oogonium becomes
A) an ovum and a tropical body. B) a secondary oocyte and a polar body. C) two polar bodies of equal size. D) two diploid cells.
Marine bony fish __________ water by osmosis, while freshwater bony fish __________ water by osmosis. Fill in the blank(s) with the appropriate word(s)
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a. liver b. brain c. heart d. lungs e. kidney