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BIOL1020 - Lecture 18 - Independent Assortment

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This deck covers key concepts from Mendel's laws, di-hybrid crosses, sex-linked genes, and the definition of hemizygous, as discussed in BIOL1020 Lecture 18.

what are Mendel’s laws?

1) law of segregation - alternative versions of genes account for variations in inherited characters (different alleles confer different traits). individuals inherit 2 alleles from each character, one from each parent, and alleles segregate in progeny. 2) law of independent assortment - alleles of different gene assort independently of each other.
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Key Terms

Term
Definition
what are Mendel’s laws?
1) law of segregation - alternative versions of genes account for variations in inherited characters (different alleles confer different traits). indi...
what is a di-hybrid cross?
inheritance of two independent traits > for genes on separate chromosomes > each allele pair shows independent segregation > F1 produces four gamete g...
what is an example of a sex linked gene?
colour blindness > 5-10% of males cannot distinguish red and green > colour blind males never transmit their allele to their sons, but can transmit to...
what does hemizygous mean?
males are hemizygous for x linked genes

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TermDefinition
what are Mendel’s laws?
1) law of segregation - alternative versions of genes account for variations in inherited characters (different alleles confer different traits). individuals inherit 2 alleles from each character, one from each parent, and alleles segregate in progeny. 2) law of independent assortment - alleles of different gene assort independently of each other.
what is a di-hybrid cross?
inheritance of two independent traits > for genes on separate chromosomes > each allele pair shows independent segregation > F1 produces four gamete genotypes > F2 shows 9:3:3:1 phenotypes
what is an example of a sex linked gene?
colour blindness > 5-10% of males cannot distinguish red and green > colour blind males never transmit their allele to their sons, but can transmit to grandsons via carrier daughters.
what does hemizygous mean?
males are hemizygous for x linked genes