Mendelian Genetics: multiple type questions

1. Mendel did the experiment with peas to explain the inheritance pattern from generation to generation.

True

False

Mendel conducted experiments with peas in order to understand how traits are passed down from one generation to the next. By carefully observing and recording the characteristics of different pea plants, he was able to establish the principles of inheritance and develop the concept of dominant and recessive traits. This groundbreaking research laid the foundation for modern genetics and our understanding of how traits are inherited in organisms.

Explanation

Mendel conducted experiments with peas in order to understand how traits are passed down from one generation to the next. By carefully observing and recording the characteristics of different pea plants, he was able to establish the principles of inheritance and develop the concept of dominant and recessive traits. This groundbreaking research laid the foundation for modern genetics and our understanding of how traits are inherited in organisms.

2. If a cross between two mice produce 10 black mice and 3 white mice. Which skin color is dominant?

White

Black

None

Both

Black (most of the offspring are black so black is dominant)

Explanation

Black (most of the offspring are black so black is dominant)

3. Observable traits/ characteristics of an organism are called _______________.

Observable traits or characteristics of an organism are referred to as its phenotype. This includes any physical or behavioral attributes that can be observed or measured, such as eye color, height, or temperament. The phenotype is the result of the interaction between an organism's genetic makeup (genotype) and its environment. It is what allows us to visually distinguish between individuals and plays a crucial role in understanding the inheritance and expression of traits in populations.

Explanation

Observable traits or characteristics of an organism are referred to as its phenotype. This includes any physical or behavioral attributes that can be observed or measured, such as eye color, height, or temperament. The phenotype is the result of the interaction between an organism's genetic makeup (genotype) and its environment. It is what allows us to visually distinguish between individuals and plays a crucial role in understanding the inheritance and expression of traits in populations.

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4. Which of the following cross will give a 1:2:1 genotypic ratio.

Aa X Aa

Aa X AA

AA X Aa

Draw a punnett square (monohybrid cross)
Aa X Aa will give 1 AA: 2Aa: 1aa
aa X AA will give all Aa
AA X Aa will give 2 AA: 2Aa

Explanation

Draw a punnett square (monohybrid cross)
Aa X Aa will give 1 AA: 2Aa: 1aa
aa X AA will give all Aa
AA X Aa will give 2 AA: 2Aa

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6. Law of Independent Assortment explains the inheritance of single traits.

True

False

Law of Independent Assortment explains the inheritance of two traits.
Law of segregation explains the inheritance of single trait.

Explanation

Law of Independent Assortment explains the inheritance of two traits.
Law of segregation explains the inheritance of single trait.

7. Monohybrid cross is a cross between two individual in which inheritance of two traits are considered.

True

False

Dihybrid cross is a cross between two individual in which inheritance of two traits are considered.
monohybrid cross is a cross between two individual in which inheritance of single traits are considered.

Explanation

Dihybrid cross is a cross between two individual in which inheritance of two traits are considered.
monohybrid cross is a cross between two individual in which inheritance of single traits are considered.

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9. From the following which is an example of a heterozygous allele.

Rr

WWRR

Rr

Heterozygous are when the allele are of two different kind, that is Rr.
rr, RR, wwrr and WWRR are both homozygous.

Explanation

Heterozygous are when the allele are of two different kind, that is Rr.
rr, RR, wwrr and WWRR are both homozygous.

10. Mendel used the _____________ cross to explain the separation of a gene pair.

Mendel used the monohybrid cross to explain the separation of a gene pair. In a monohybrid cross, Mendel crossed two individuals that were heterozygous for a single trait. This allowed him to observe the inheritance pattern of a single gene and understand how the gene pair separates during gamete formation. By studying the offspring of these crosses, Mendel was able to establish the principles of inheritance and develop his laws of segregation and independent assortment.

Explanation

Mendel used the monohybrid cross to explain the separation of a gene pair. In a monohybrid cross, Mendel crossed two individuals that were heterozygous for a single trait. This allowed him to observe the inheritance pattern of a single gene and understand how the gene pair separates during gamete formation. By studying the offspring of these crosses, Mendel was able to establish the principles of inheritance and develop his laws of segregation and independent assortment.

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Mendelian Genetics: Multiple Type Questions