$CATEGORY: Science - Khan Academy/9.Heredity & Evolution/9.Heredity & Evolution--Evolution

//Multiple Choice

Which of the following is an inherited trait?
{
  ~ Learning to ride a bicycle
  = Eye color
  ~ Speaking a language
  ~ None of the above
}

Acquired traits are\:
{
  ~ Passed on to the next generation
  = Not passed on to the next generation
  ~ Controlled by DNA
  ~ Always harmful
}

Which of these is an acquired trait?
{
  ~ Hair color
  = Weight gain due to exercise
  ~ Height
  ~ Blood group
}

Inherited traits are controlled by\:
{
  ~ Environment
  = Genes
  ~ Training
  ~ None of the above
}

Which of the following is not an inherited trait?
{
  ~ Tongue rolling
  ~ Free earlobes
  = Scar on the skin
  ~ Curly hair
}

Acquired traits are the result of\:
{
  ~ Genetic inheritance
  = Environmental influence
  ~ Mutations
  ~ Natural selection
}

Which of these traits is passed from parents to offspring?
{
  ~ Tattoo
  = Ability to digest milk
  ~ Knowledge of mathematics
  ~ Broken bone
}

A characteristic that appears in offspring due to DNA is called\:
{
  ~ Acquired trait
  = Inherited trait
  ~ External trait
  ~ Behavioral trait
}

What is the main difference between acquired and inherited traits?
{
  ~ Acquired traits are genetic; inherited traits are not.
  = Inherited traits are genetic; acquired traits are not.
  ~ Both are genetic.
  ~ Both are non-genetic.
}

An example of an inherited trait is\:
{
  ~ Knowledge of swimming
  = Blue eyes
  ~ A pierced ear
  ~ A scar from an accident
}

//True or False

Acquired traits are passed to the next generation. {F}

Inherited traits are controlled by genes. {T}

Scars are inherited traits. {F}

Eye color is an inherited trait. {T}

Acquired traits can influence the DNA of an organism. {F}

Traits like blood groups are acquired during a lifetime. {F}

Inherited traits are influenced by environmental factors. {F}

Knowledge of a skill, such as painting, is an acquired trait. {T}

Mutations can lead to inherited changes in traits. {T}

Acquired traits are a result of changes in genetic material. {F}

//Fill in the blanks

Traits that are controlled by ______ are inherited traits.
{
  = Genes
  ~ Environment
}

Acquired traits ______ be passed on to the next generation.
{
  = Cannot
  ~ Can
}

A scar on the body is an example of an ______ trait.
{
  = Acquired
  ~ Inherited
}

Traits such as eye color and blood group are ______ traits.
{
  = Inherited
  ~ Acquired
}

The ability to speak a specific language is an example of an ______ trait.
{
  = Acquired
  ~ Inherited
}

Genetic information is stored in ______.
{
  = DNA
  ~ Protein
}

______ traits result from environmental influence.
{
  = Acquired
  ~ Inherited
}

Changes in ______ do not result in inherited traits.
{
  = DNA
  ~ Behavior
}

Rolling of the tongue is an example of an ______ trait.
{
  = Inherited
  ~ Acquired
}

Traits that are passed from one generation to another are controlled by ______.
{
  = Genes
  ~ Environment
}

//Numericals

If a person has a dominant trait for brown eyes (B) and recessive for blue eyes (b), what will be the phenotype of Bb?
{
  = Brown eyes
  ~ Blue eyes
}

In a monohybrid cross, the F1 generation has 100% tall plants. What is the genotype?
{
  ~ TT
  = Tt
  ~ tt
}

In a dihybrid cross, what is the phenotypic ratio in the F2 generation?
{
  ~ 3\:1
  = 9\:3\:3\:1
  ~ 1\:2\:1
}

If a heterozygous tall plant (Tt) is crossed with a homozygous short plant (tt), what percentage of offspring will be short?
{
  ~ 25%
  = 50%
  ~ 75%
}

In a cross between two heterozygous individuals (Tt x Tt), what is the probability of producing a homozygous tall plant?
{
  = 25%
  ~ 50%
  ~ 75%
}

If both parents have the genotype Aa, what is the probability of the offspring having the genotype AA?
{
  = 25%
  ~ 50%
  ~ 75%
}

A plant with genotype RrYy is crossed with another RrYy plant. How many offspring will show both dominant traits?
{
  = 9 out of 16
  ~ 3 out of 16
  ~ 1 out of 16
}

If one parent has blood group A (IAi) and the other has blood group B (IBi), what is the probability of offspring with blood group AB?
{
  = 25%
  ~ 50%
  ~ 75%
}

In a monohybrid cross, the genotypic ratio of the F2 generation is ______.
{
  = 1\:2\:1
  ~ 3\:1
}

A pea plant with genotype Tt is self-pollinated. What fraction of the offspring will be short?
{
  = 1/4
  ~ 1/2
  ~ 3/4
}

//Match the following

Match the following items from Column A with their correct corresponding options from Column B\:
{
= Eye colour -> Genetic material
= Scar -> Inherited trait
= DNA -> Acquired trait
= Learning to swim -> Environmental influence
}


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