Help me on 28 please

Apopulation of white-tailed deer inhabits a certain patch of forest in michigan. which group of alleles can be considered the gene pool of those deer? question 4 options: the dominant alleles of the white-tailed deer in this population only the dominant alleles of all white-tailed deer all alleles of the white-tailed deer in this population only all alleles of all white-tailed deer

Where do homologous chromosomes exchange genetic material through crossing over?               a.  chlorophyll    b.  centrosomes    c.  centromeres    d.  chiasma

Which organisms have pharyngeal arches that develop from all three germ layers and go through the same development stages as embryos? 1.bird 2.ladybug 3.starfish 4.snake