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Sex Determination & Sex Chromosomes 4 Flashcards

(17 cards)

1
Q

Sex differences depends on the presence of ______________

A

Sex chromosomes

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2
Q

_______________ determine a sex in a specie so determines if your a male or female

A

Sex chromsomes

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3
Q

For humans females have two ______ chromosomes so they are homogametic sex & males have an _________ chromosomes so they are heterogametic sex

A

Have two XX chromosome, X&Y chromosome

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4
Q

In the male there are two types of sperm produce one that carries the X chromosome and one that carries the Y chromosome so therefor the male _______________

A

Determines the gender (sex)

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5
Q

Humans have 22 pairs of ___________ & one pair of sex chromosomes

A

Autosomes

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6
Q

Autosomes

A

Chromosomes that are not sex chromosomes

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7
Q

The ______ gene on the Y chromosome causes a person to be a male

A

SRY

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8
Q

Hemizygous

A

Describes the single copy of an X-linked gene (A gene on an X chromosome) in the male

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9
Q

Males are consider ___________ for X-linked genes because they have only one X chromosome

A

Hemizygous

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10
Q

Wild type trait

A

Trait that a whole population has so its common

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11
Q

X-linked genes (or X-linked alleles) are only genes on the _____ chromosome

A

X chromosome

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12
Q

In an X-linked inhertiance the _____ chromosome has no allele & is not involved in the X-linked inheritance its just states that its a boy

A

Y -Chromosome

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13
Q

What does it mean when result is sex bias?

A

Means that only a certain gender has the mutant allele (ex. only males are white eye in fruit flies)

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14
Q

What does it mean when results are not sex bias?

A

Means that both sex have mutant alleles (ex. both male & female fruit flies are white eye)

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15
Q

X-linked inheritance

A

Genes or alleles on the X-chromosome determines the phenotype (trait) of the organism

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16
Q

X-linked recessive

A

An allele that is recessive on the x chromosome

17
Q

X-linked dominant

A

An allele that is dominant on the X chromosome