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

//Multiple Choice

Why did Mendel choose pea plants for his experiments? {
    ~They have a long lifespan
    ~They can cross-pollinate easily
    =They have distinct, contrasting traits
    ~They are difficult to grow
}

Pea plants are suitable for Mendel’s experiments because they\: {
    ~Produce a large number of seeds
    ~Have a long reproductive cycle
    ~Can self-pollinate
    =Both a and c
}

Mendel’s pea plants were advantageous because they had ________ traits. {
    ~Multiple
    =Contrasting
    ~Identical
    ~Mutated
}

Mendel could control the breeding of pea plants because they can\: {
    ~Self-pollinate
    ~Cross-pollinate
    =Both a and b
    ~Neither a nor b
}

The pea plant’s short lifespan allowed Mendel to observe inheritance patterns over multiple generations in a short period of time. This helped him to\: {
    =Save time
    ~Observe the effects of mutations
    ~Experiment with different species
    ~All of the above
}

Mendel chose pea plants because they have ________ that made it easier to study inheritance. {
    ~Large flowers
    ~Simple genetic makeup
    =Distinct, observable traits
    ~None of the above
}

Which of the following is a reason Mendel chose pea plants for his genetic experiments? {
    ~Pea plants grow in all climates
    =Pea plants have a variety of traits that can be easily observed
    ~Pea plants can only cross-pollinate
    ~Pea plants have a very complex genetic structure
}

Mendel's pea plant experiments helped him establish the basic laws of inheritance because\: {
    ~Pea plants have a large number of chromosomes
    =They produce offspring with predictable traits
    ~They can only self-pollinate
    ~They have a very high mutation rate
}

The pea plant's ability to produce large numbers of offspring in a short period of time allowed Mendel to\: {
    ~Conduct experiments on a large scale
    ~Observe inheritance patterns over many generations
    ~Study the effects of environmental changes
    =Both a and b
}

Mendel's pea plants had traits that were\: {
    ~Inherited in a non-predictable manner
    ~Controlled by multiple genes
    =Controlled by single genes with clear dominant and recessive alleles
    ~Affected by the environment
}

//True or False

Mendel chose pea plants because they could only self-pollinate. {F}

Pea plants have a long lifespan, making them ideal for Mendel's experiments. {F}

Mendel chose pea plants because they have contrasting traits, such as tall vs. short plants. {T}

Pea plants produce a small number of seeds, which made them suitable for Mendel’s experiments. {F}

The ability of pea plants to cross-pollinate allowed Mendel to control the breeding process. {T}

Mendel’s pea plants showed a phenotypic ratio of 9\:3\:3\:1 in the F2 generation for a monohybrid cross. {F}

Mendel’s pea plants could exhibit both dominant and recessive traits. {T}

Mendel’s experiments were conducted using pea plants because they grow very slowly. {F}

Mendel chose pea plants because they had both dominant and recessive traits that could be easily observed. {T}

The short growth cycle of pea plants helped Mendel to complete his experiments over multiple generations in a short period of time. {T}



//Fill in the blanks

Mendel chose pea plants because they have ________ traits that can be easily observed. {
    ~Similar
    =Contrasting
    ~Mutated
    ~Recessive
}

The ability of pea plants to ________ made it easier for Mendel to control their breeding. {
    ~Cross-pollinate
    ~Self-pollinate
    =Both a and b
    ~None of the above
}

Mendel chose pea plants because they have a ________ lifespan, allowing him to observe multiple generations quickly. {
    ~Long
    =Short
    ~Variable
    ~Average
}

One of the reasons Mendel chose pea plants was because they produce a ________ number of seeds. {
    ~Small
    =Large
    ~Medium
    ~Variable
}

Pea plants are ideal for genetic experiments because they can exhibit ________ inheritance patterns. {
    ~Unpredictable
    =Simple
    ~Complex
    ~None of the above
}

The pea plant’s ability to self-pollinate and cross-pollinate helped Mendel establish the laws of ________. {
    =Inheritance
    ~Evolution
    ~Mutation
    ~Natural selection
}

Mendel chose pea plants because they exhibit ________ traits, such as tall vs. short. {
    =Single
    ~Multiple
    ~Dominant
    ~Mutant
}

The clear ________ of traits in pea plants allowed Mendel to track inheritance patterns easily. {
    ~Complexity
    ~Inheritance
    =Expression
    ~Dominance
}

Mendel’s pea plant experiments allowed him to observe inheritance patterns over ________ generations in a short period. {
    ~Few
    =Several
    ~Many
    ~Multiple
}

The short ________ of pea plants helped Mendel complete his experiments in a short amount of time. {
    =Growth cycle
    ~Lifespan
    ~Reproductive phase
    ~Pollination period
}

//Numericals

Mendel used pea plants that could produce an average of ________ seeds per plant. {
    ~10
    ~50
    =100
    ~200
}

If Mendel's pea plants produced 500 seeds in total and 75% of them showed the dominant phenotype, how many seeds showed the dominant phenotype? {
    =400
    ~350
    ~500
    ~250
}

Mendel's pea plants showed a phenotypic ratio of ________ in the F2 generation. {
    ~1\:1
    ~2\:1
    =3\:1
    ~9\:3\:3\:1
}

Mendel’s experiments were conducted over ________ generations of pea plants. {
    ~1
    =2
    ~3
    ~4
}

Mendel observed ________ distinct traits in his pea plants. {
    ~2
    ~4
    =7
    ~10
}

If Mendel had 1,000 pea plants in the F2 generation, approximately ________ would be expected to exhibit the recessive phenotype. {
    =250
    ~200
    ~300
    ~400
    ~500
}

In a cross between two heterozygous pea plants (Tt x Tt), the expected number of homozygous dominant (TT) plants in the F2 generation would be ________. {
    =25%
    ~50%
    ~75%
    ~100%
}

Mendel's pea plants could produce up to ________ seeds in a single generation. {
    ~100
    =200
    ~300
    ~500
}

Mendel’s pea plants could self-pollinate, producing ________ offspring. {
    ~100
    ~200
    ~300
    =Identical
}

Mendel's pea plants showed a ________ ratio of homozygous dominant to heterozygous plants in the F2 generation. {
    ~1\:1
    ~1\:2
    ~2\:1
    =1\:2\:1
}

//Match the following

Match the following items from Column A with their correct corresponding options from Column B\:
{
=Pea plants can self-pollinate -> Helps control breeding
=Pea plants produce a large number of seeds -> Allows rapid generation of offspring
=Pea plants exhibit contrasting traits -> Helps observe clear inheritance patterns
=Pea plants have a short lifespan -> Helps track inheritance over several generations
}


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