Two parents, each with tt gene alleles, are true breeding and are crossed. which alleles will their offspring have? a. tt b. tt c. tt d. tt

What is the name of the two satelites on mars

Aflame cell is at the end of each tubule of the nephridium malpighian tubules kidneys none of the above

During crossing-over, a. genetic material is exchanged between nonsister chromatids, resulting in new combinations of alleles. b. nonsister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. c. one homologous chromosome of a tetrad is exchanged with another tetrad, resulting in new combinations of alleles. d. sister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. e. genetic material is exchanged between sister chromatids, resulting in new combinations of alleles.