Genetics at University Of Central Punjab | Flashcards & Summaries

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Lernmaterialien für Genetics an der University of Central Punjab

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Hybridization

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Mating, or crossing, of two varieties

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Monohybrid cross

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A cross between two parents that breed true for different
versions of a single trait.

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Dihybrid cross

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a cross between two true-breeding parents that express
different traits for two characteristics.

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P generation

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True breeding parents.

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P generation

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True breeding parents.

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F1 generation

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(first filial) Hybrid offspring of the P generation

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F2 generation:

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• F2 generation

(second filial) Offspring from the self-fertilisation of the F1
hybrids.

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GENOTYPE

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The genotype refers to the entire set of genes in a cell, an
organism, or an individual. A gene for a particular character
or trait may exist in two forms; one is dominant (Denoted by a Capital
a letter such as ‘’T’’) and the other is recessive (denoted by a small letters such as
‘’t’’).

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Examples of Genotype

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There are three basic genotypes for a particular
character:
• AA = homozygous dominant
• Aa = heterozygous
• aa = homozygous recessive

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What is the Hemizygous genotype?

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It describes an individual who has only one
member of a chromosome pair or chromosome
segment rather than the usual two. Hemizygosity is often used
to describe X-linked genes in males who have only one X
chromosome. They have only a single copy of a gene instead
of the customary two copies.

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What is meant by Phenotype?

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Phenotype is the physical appearance of an organism as a result of the
interaction of its genotype and the environment.
Some examples would be:
• Size
• Shape
• Color

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What is Truebreeding?

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When the plants self-pollinate all of their offsprings are of the same variety. 

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  • 500 Karteikarten
  • 329 Studierende
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Beispielhafte Karteikarten für deinen Genetics Kurs an der University of Central Punjab - von Kommilitonen auf StudySmarter erstellt!

Q:

Hybridization

A:

Mating, or crossing, of two varieties

Q:

Monohybrid cross

A:

A cross between two parents that breed true for different
versions of a single trait.

Q:

Dihybrid cross

A:

a cross between two true-breeding parents that express
different traits for two characteristics.

Q:

P generation

A:

True breeding parents.

Q:

P generation

A:

True breeding parents.

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Q:

F1 generation

A:

(first filial) Hybrid offspring of the P generation

Q:

F2 generation:

A:

• F2 generation

(second filial) Offspring from the self-fertilisation of the F1
hybrids.

Q:

GENOTYPE

A:

The genotype refers to the entire set of genes in a cell, an
organism, or an individual. A gene for a particular character
or trait may exist in two forms; one is dominant (Denoted by a Capital
a letter such as ‘’T’’) and the other is recessive (denoted by a small letters such as
‘’t’’).

Q:

Examples of Genotype

A:

There are three basic genotypes for a particular
character:
• AA = homozygous dominant
• Aa = heterozygous
• aa = homozygous recessive

Q:

What is the Hemizygous genotype?

A:

It describes an individual who has only one
member of a chromosome pair or chromosome
segment rather than the usual two. Hemizygosity is often used
to describe X-linked genes in males who have only one X
chromosome. They have only a single copy of a gene instead
of the customary two copies.

Q:

What is meant by Phenotype?

A:

Phenotype is the physical appearance of an organism as a result of the
interaction of its genotype and the environment.
Some examples would be:
• Size
• Shape
• Color

Q:

What is Truebreeding?

A:

When the plants self-pollinate all of their offsprings are of the same variety. 

Genetics

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