17.- Variation in a species

Descripción

https://www.khanacademy.org/science/biology/her/evolution-and-natural-selection/v/variation-in-a-species
PEDRO ALVAREZ JIMENEZ
Test por PEDRO ALVAREZ JIMENEZ, actualizado hace más de 1 año
PEDRO ALVAREZ JIMENEZ
Creado por PEDRO ALVAREZ JIMENEZ hace casi 9 años
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Resumen del Recurso

Pregunta 1

Pregunta
Any change in our DNA code can produce an effect, most of the time in form of…
Respuesta
  • Mutation that produces cancer
  • Mutation that produces positive changes
  • Mutation that changes the proteins

Pregunta 2

Pregunta
What is the human being chromosomal number?
Respuesta
  • 46 pairs of chromosomes
  • 23 pairs of chromosomes
  • 23 chromosomes

Pregunta 3

Pregunta
Why do we have two different alleles for each trait?
Respuesta
  • Because we need them for variation
  • Because we inherited from our parents
  • Because we have pairs of chromosomes

Pregunta 4

Pregunta
Why homologous chromosomes are not identical?
Respuesta
  • They present the same set of genes but different alleles
  • They present different set of genes but the same alleles
  • The present different set of genes and different alleles

Pregunta 5

Pregunta
What is the difference between genotype and phenotype?
Respuesta
  • What we don´t see and what we see
  • Always the same and always different
  • The second is the physical representation of the first

Pregunta 6

Pregunta
Mutation is a rare event, so that variation in species is due to what processes?
Respuesta
  • Recombination
  • Sexual reproduction
  • Genetic drift

Pregunta 7

Pregunta
Why having two genders have been such a great idea?
Respuesta
  • Because it is very funny
  • Because it introduces variation into population
  • Because we need more biodiversity
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