Dihybrid

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LINKAGE
Comparison of gametes produced by a heterozygous organism for two genes when they are UNLINKED and LINKED

GF 2007

UNLINKED GENES

GF 2007

A Diploid cell with Unlinked genes
AB alleles on different paternal chromosomes ab alleles on different maternal chromosomes b B A

a

GF 2007

A Diploid cell with Unlinked genes
AB alleles on different paternal chromosomes ab alleles on different maternal chromosomes

B

b

A

a

GF 2007

A Diploid cell with Unlinked genes
AB alleles on different paternal chromosomes ab alleles on different maternal chromosomes

B

b

A

a

GF 2007

A Diploid cell with Unlinked genes
AB alleles on different paternal chromosomes ab alleles on different maternal chromosomes B b A a

GF 2007

A Diploid cell with Unlinked genes
AB alleles on different paternal chromosomes ab alleles on different maternal chromosomes B b

A a

GF 2007

A Diploid cell with Unlinked genes
AB alleles on different paternal chromosomes ab alleles on different maternal chromosomes B b

a

A

GF 2007

A Diploid cell with Unlinked genes

AB alleles on different paternal chromosomes ab alleles on different maternal chromosomes

B B

b b

Homologous chromosomes pair-up. Chromatids visible.

a a

A A

GF 2007

A Diploid cell with Unlinked genes – Meiosis AB alleles on I

different paternal chromosomes ab alleles on different maternal chromosomes

B B

b b

Homologous chromosomes pair-up. Chromatids visible. Spindle forms

a a

A A

GF 2007

A Diploid cell with Unlinked genes – Meiosis I
AB alleles on different paternal chromosomes ab alleles on different maternal chromosomes B B b b

Homologous chromosomes pair-up. Chromatids visible. Spindle forms

a a

A A

GF 2007

A Diploid cell with Unlinked genes – Meiosis I
AB alleles on different paternal chromosomes ab alleles on different maternal chromosomes B B b b

Homologous chromosomes pair-up.
a a A A

Chromatids visible. Spindle forms

GF 2007

A Diploid cell with Unlinked genes – Meiosis I
AB alleles on different paternal chromosomes ab alleles on different maternal chromosomes B B b b

Homologous chromosomes pair-up. Chromatids visible. Spindle forms

a a

A A

GF 2007

Pairs separate

A Diploid cell with Unlinked genes – Meiosis I
AB alleles on different paternal chromosomes ab alleles on different maternal chromosomes B B b b

Homologous chromosomes pair-up. Chromatids visible. Spindle forms Pairs separate

a a

A A

GF 2007

A Diploid cell with Unlinked genes – Meiosis I
AB alleles on different paternal chromosomes ab alleles on different maternal chromosomes B B b b

Homologous chromosomes pair-up. Chromatids visible. Spindle forms Pairs separate

a a

A A

GF 2007

A Diploid cell with Unlinked genes – Meiosis I
AB alleles on different paternal chromosomes ab alleles on different maternal chromosomes B B b b

a a

A A

Homologous chromosomes pair-up. Chromatids visible. Spindle forms

GF 2007

Pairs separate

A Diploid cell with Unlinked genes – Meiosis II
AB alleles on different paternal chromosomes ab alleles on different maternal chromosomes B B b b

a a

A A

Second meiotic division: separation of chromatids.

GF 2007

A Diploid cell with Unlinked genes – Meiosis II
AB alleles on different paternal chromosomes ab alleles on different maternal chromosomes B B b b

a a

A A

Second meiotic division: separation of chromatids.

GF 2007

A Diploid cell with Unlinked genes – Meiosis II
AB alleles on different paternal chromosomes ab alleles on different maternal chromosomes B B b b

a a

A A

Second meiotic division: separation of chromatids.

GF 2007

A Diploid cell with Unlinked genes – Meiosis II
AB alleles on different paternal chromosomes ab alleles on different maternal chromosomes B B b b

a a

A A

Second meiotic division: separation of...
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