Sex chromosomes and dosage Flashcards

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1
Q

incomplete dominance

A

heterozygote has phenotype that is intermediate between that of homozygotes

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2
Q

co-dominance

A

different alleles give qualitatively different dominant traits and you see both traits in heterozygotes at the same time

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3
Q

ABO blood types

A

example of co-dominance; there are different carbs on the blood’s surface and can cause transfusion reactions

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4
Q

I gene

A

the gene that codes for blood type

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5
Q

pleiotropy

A

a single mutation may affect many tissues and processes

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6
Q

autosome

A

non sex chromosomes

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7
Q

pseudoautosomal region

A

region on sex chromosomes that allows homologous pairs to be linked (the coding regions match)

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8
Q

SRY gene

A

in males, encodes a master transcription factor for the creation of testes and testosterone

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9
Q

sex linked gene

A

many genes that are found on X are not found on Y and vice versa

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10
Q

hemizygous

A

half diploid, ex. X and Y do not have the same genes so an XY zygote would only have one of each gene region

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