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Biology > 10.2 Dihybrid Crosses and Gene Linkage > Flashcards

10.2 Dihybrid Crosses and Gene Linkage Flashcards

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1
Q

Distinguish between autosomes and sex chromosomes

A 
Sex chromosomes
	• X and Y chromosomes
	• Causes determination of gender
	• 1 pair
	• Carry sex linked genes
		○ e.g. haemophilia
	• Y is much shorter than X
	• X has non-homologous region

Autosomes
• All other chromosomes
• Carry genes
• 22 homologous pairs

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2
Q

Distinguish between autosomes and sex chromosomes

A 
Sex chromosomes
	• X and Y chromosomes
	• Determine gender
	• 1 pair
	• Carry sex linked genes
		- e.g. haemophilia
	• Y is much shorter than X
	• X has non-homologous region

Autosomes
• All other chromosomes
• Carry genes
• 22 homologous pairs

How well did you know this?
1
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2
3
4
5
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3
Q

Distinguish between autosomes and sex chromosomes

A 
Sex chromosomes
	• X and Y chromosomes
	• Causes determination of gender
	• 1 pair
	• Carry sex linked genes
		○ e.g. haemophilia
	• Y is much shorter than X
	• X has non-homologous region

Autosomes
• All other chromosomes
• Carry genes
• 22 homologous pairs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Distinguish between autosomes and sex chromosomes

A 
Sex chromosomes
	• X and Y chromosomes
	• Causes determination of gender
	• 1 pair
	• Carry sex linked genes
		○ e.g. haemophilia
	• Y is much shorter than X
	• X has non-homologous region

Autosomes
• All other chromosomes
• Carry genes
• 22 homologous pairs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Distinguish between autosomes and sex chromosomes

A 
Sex chromosomes
	• X and Y chromosomes
	• Causes determination of gender
	• 1 pair
	• Carry sex linked genes
		○ e.g. haemophilia
	• Y is much shorter than X
	• X has non-homologous region

Autosomes
• All other chromosomes
• Carry genes
• 22 homologous pairs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Distinguish between autosomes and sex chromosomes

A 
Sex chromosomes
	• X and Y chromosomes
	• Causes determination of gender
	• 1 pair
	• Carry sex linked genes
		○ e.g. haemophilia
	• Y is much shorter than X
	• X has non-homologous region

Autosomes
• All other chromosomes
• Carry genes
• 22 homologous pairs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Distinguish between autosomes and sex chromosomes

A 
Sex chromosomes
	• X and Y chromosomes
	• Causes determination of gender
	• 1 pair
	• Carry sex linked genes
		○ e.g. haemophilia
	• Y is much shorter than X
	• X has non-homologous region

Autosomes
• All other chromosomes
• Carry genes
• 22 homologous pairs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Distinguish between autosomes and sex chromosomes

A 
Sex chromosomes
	• X and Y chromosomes
	• Causes determination of gender
	• 1 pair
	• Carry sex linked genes
		○ e.g. haemophilia
	• Y is much shorter than X
	• X has non-homologous region

Autosomes
• All other chromosomes
• Carry genes
• 22 homologous pairs

How well did you know this?
1
Not at all
2
3
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5
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9
Q

Explain how crossing over between non-sister chromatids of a homologous pair in prophase I can result in the exchange of alleles

A
  • During crossing over in prophase I, non-sister chromatids of a homologous pair may break and reform at points of attachment called chiasmata
    • As these chromatids break at the same point, any gene loci below the point of the break will be exchanged as a result of recombination
    • This means that maternal and paternal alleles may be exchanged between the maternal and paternal chromosomes, creating new gene combinations
    • The further apart two gene loci are on a chromosome, the more likely they are to be exchanged
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10
Q

Define linkage group

A

• A linkage group is a group of genes found on the same chromosome
• They do not follow the law of independent assortment
• Linked genes will tend to be inherited together, which results in fewer genetic combinations
– The only way to separate them is through recombination (via crossing over during synapsis)

Linked genes are represented as vertical pairs

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11
Q

Explain how crossing over between non-sister chromatids of a homologous pair in prophase I can result in the exchange of alleles

A
  • During crossing over in prophase I, non-sister chromatids of a homologous pair may break and reform at points of attachment called chiasmata
    • As these chromatids break at the same point, any gene loci below the point of the break will be exchanged as a result of recombination
    • This means that maternal and paternal alleles may be exchanged between the maternal and paternal chromosomes, creating new gene combinations
    • The further apart two gene loci are on a chromosome, the more likely they are to be exchanged
How well did you know this?
1
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12
Q

Define linkage group

A

• A linkage group is a group of genes found on the same chromosome
• They do not follow the law of independent assortment
• Linked genes will tend to be inherited together, which results in fewer genetic combinations
– The only way to separate them is through recombination (via crossing over during synapsis)

Linked genes are represented as vertical pairs

How well did you know this?
1
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13
Q

Explain how crossing over between non-sister chromatids of a homologous pair in prophase I can result in the exchange of alleles

A
  • During crossing over in prophase I, non-sister chromatids of a homologous pair may break and reform at points of attachment called chiasmata
    • As these chromatids break at the same point, any gene loci below the point of the break will be exchanged as a result of recombination
    • This means that maternal and paternal alleles may be exchanged between the maternal and paternal chromosomes, creating new gene combinations
    • The further apart two gene loci are on a chromosome, the more likely they are to be exchanged
How well did you know this?
1
Not at all
2
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14
Q

Define linkage group

A

• A linkage group is a group of genes found on the same chromosome
• They do not follow the law of independent assortment
• Linked genes will tend to be inherited together, which results in fewer genetic combinations
– The only way to separate them is through recombination (via crossing over during synapsis)

Linked genes are represented as vertical pairs

How well did you know this?
1
Not at all
2
3
4
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15
Q

Explain how crossing over between non-sister chromatids of a homologous pair in prophase I can result in the exchange of alleles

A
  • During crossing over in prophase I, non-sister chromatids of a homologous pair may break and reform at points of attachment called chiasmata
    • As these chromatids break at the same point, any gene loci below the point of the break will be exchanged as a result of recombination
    • This means that maternal and paternal alleles may be exchanged between the maternal and paternal chromosomes, creating new gene combinations
    • The further apart two gene loci are on a chromosome, the more likely they are to be exchanged
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Define linkage group

A

• A linkage group is a group of genes found on the same chromosome
• They do not follow the law of independent assortment
• Linked genes will tend to be inherited together, which results in fewer genetic combinations
– The only way to separate them is through recombination (via crossing over during synapsis)

Linked genes are represented as vertical pairs

17
Q

Explain how crossing over between non-sister chromatids of a homologous pair in prophase I can result in the exchange of alleles

A
  • During crossing over in prophase I, non-sister chromatids of a homologous pair may break and reform at points of attachment called chiasmata
    • As these chromatids break at the same point, any gene loci below the point of the break will be exchanged as a result of recombination
    • This means that maternal and paternal alleles may be exchanged between the maternal and paternal chromosomes, creating new gene combinations
    • The further apart two gene loci are on a chromosome, the more likely they are to be exchanged
18
Q

Define linkage group

A

• A linkage group is a group of genes found on the same chromosome
• They do not follow the law of independent assortment
• Linked genes will tend to be inherited together, which results in fewer genetic combinations
– The only way to separate them is through recombination (via crossing over during synapsis)

Linked genes are represented as vertical pairs

19
Q

Explain how crossing over between non-sister chromatids of a homologous pair in prophase I can result in the exchange of alleles

A
  • During crossing over in prophase I, non-sister chromatids of a homologous pair may break and reform at points of attachment called chiasmata
    • As these chromatids break at the same point, any gene loci below the point of the break will be exchanged as a result of recombination
    • This means that maternal and paternal alleles may be exchanged between the maternal and paternal chromosomes, creating new gene combinations
    • The further apart two gene loci are on a chromosome, the more likely they are to be exchanged
20
Q

Define linkage group

A

• A linkage group is a group of genes found on the same chromosome
• They do not follow the law of independent assortment
• Linked genes will tend to be inherited together, which results in fewer genetic combinations
– The only way to separate them is through recombination (via crossing over during synapsis)

Linked genes are represented as vertical pairs

21
Q

Explain how crossing over between non-sister chromatids of a homologous pair in prophase I can result in the exchange of alleles

A
  • During crossing over in prophase I, non-sister chromatids of a homologous pair may break and reform at points of attachment called chiasmata
    • As these chromatids break at the same point, any gene loci below the point of the break will be exchanged as a result of recombination
    • This means that maternal and paternal alleles may be exchanged between the maternal and paternal chromosomes, creating new gene combinations
    • The further apart two gene loci are on a chromosome, the more likely they are to be exchanged
22
Q

Define linkage group

A

• A linkage group is a group of genes found on the same chromosome
• They do not follow the law of independent assortment
• Linked genes will tend to be inherited together, which results in fewer genetic combinations
– The only way to separate them is through recombination (via crossing over during synapsis)

Linked genes are represented as vertical pairs

23
Q

Explain how crossing over between non-sister chromatids of a homologous pair in prophase I can result in the exchange of alleles

A
  • During crossing over in prophase I, non-sister chromatids of a homologous pair may break and reform at points of attachment called chiasmata
    • As these chromatids break at the same point, any gene loci below the point of the break will be exchanged as a result of recombination
    • This means that maternal and paternal alleles may be exchanged between the maternal and paternal chromosomes, creating new gene combinations
    • The further apart two gene loci are on a chromosome, the more likely they are to be exchanged
24
Q

Define linkage group

A

• A linkage group is a group of genes found on the same chromosome
• They do not follow the law of independent assortment
• Linked genes will tend to be inherited together, which results in fewer genetic combinations
– The only way to separate them is through recombination (via crossing over during synapsis)

Linked genes are represented as vertical pairs

Biology (58 decks)

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