DNA testing can identify carriers of the Tay-Sachs allele. In an effort to eliminate this disease, couples at risk are urged to get tested for the allele before they marry or have children. Should doctors or the government have a role in deciding if the couple can have children together?

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Which way do the nitrogenous bases in dna pair up? a. a and g; t and c b. a and c; t and g c. a and t; g and c d. a and a; t and t; g and g; c and c

Acertain species of fish can have either long or short fins. the allele for long fins is dominant over the allele for short fins. a heterozygous, long-finned fish is crossed with a homozygous, short-finned fish. of the offspring, will have long fins and be , and will have short fins and be .