Answer Happy

QUESTION 5 Why might a gene tree have a different topology from a species tree built using data from many genes, including the one shown in the gene tree? O The gene is paraphyletic but the group of species is monophyletic. O The gene is polyphyletic, but the group of species is monophyletic. O The gene is monophyletic O Ancestral polymorphism in the gene followed by lineage sorting. O Lineage sorting followed by ancestral polymorphism in the gene. QUESTION 6 Which of the following is an important cause of gene duplication within a genome? O Unequal crossing-over during recombination. O Hybrid inviability. O Exon-shuffling. O Horizontal gene transfer. O Genetic transduction. QUESTION 7 Which of the following involves both cis-regulatory mutation and chromosomal mutation? A mutation that produces a stop codon in a protein-coding gene sequence. OA silent mutation in a protein-coding gene sequence. O An mutation that deletes an enhancer region of a protein-coding gene sequence. O A mutation that changes the affinity of a transcription factor for an enhancer region of a protein-coding gene sequence. O A mutation that changes the affinity of a transcription factor for an promotor region of a protein-coding gene sequence.