Em uma determinada raça de cão há três possibilidades de cores de pelo: preta, amarela e marrom. O alelo M é responsável pela cor preta, e seu alelo recessivo, pela cor marrom. O gene E, não alélico de M, condiciona o depósito de pigmento preto ou marrom no pelo. Já o alelo recessivo (e) impede esse depósito, originando o pelo amarelo. No cruzamento entre dois cães dessa raça, um de pelo preto heterozigoto para os dois pares de genes e outro marrom descendente de uma mãe amarela, espera-se na descendência uma proporção fenotípica de:

How are mutations continually being generated in a population (what are some of the causes of mutatuions? ) explain

The phylogenetic tree illustrates the relationship between humans and our closest living relatives. the tree was based on biochemical comparisons, including dna and amino acid sequences. according to the biomolecular data, we could infer that a) the four organisms do not have a common ancestor. b) humans are more closely related to chimps than any other apes. c) chimps are more closely related to gorillas than they are to humans. eliminate d) there is no evidence if any relationship between the four branches on the tree.

The table presents the average day and night temperatures in five cities. it also reveals whether a city receives substantial rainfall (wet climate) or little rainfall (dry climate). which city’s rocks are likeliest to experience frost wedging, and why? a) city a because the consistently subzero temperature would prevent water from melting b) city b because it is a wet region and the temperature fluctuates around the freezing point c) city c because it receives plenty of rain fall and the weather is moderately cool d) city d because the hot and dry weather would cause rocks to absorb water