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Genetics > L1-Genetics > Flashcards

L1-Genetics Flashcards

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Biology 101 flashcards
1
Q

What are the two words to say away from in Genetics?

A

Never and Always

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2
Q

Which phase is the chromosome its most condensed (what phase are they looking at in a karyotype)?

A

Metaphase

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3
Q

What are the three “shapes”/positions of the centromere of a chromosome?

A

Metacentric, Submetacentric, and Acrocentric

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4
Q

What is on the telomere of the acrocentric chromosome?

A

rRNA

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5
Q

What 2 phases surround G1?

A

Mitosis(or meiosis)—>G1—->Synthesis

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6
Q

What 2 phases surround G2?

A

Synthesis—>G2—>Mitosis

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7
Q

What are the special steps in the cell cycle that help restrict cell division?

A

CHECKPOINTS

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8
Q

What phase does the nuclear membrane disappear?

A

pro-metaphase

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9
Q

What separates in MI?

A

Homologous chromosomes

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10
Q

When does crossing over occur? What can be the result of decreased number of crossovers?

A

M1…non-disjunction

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11
Q

What is the product of complete oogenesis? 1 ovum = how many polar bodies??

A

1 ovum=2 polar bodies

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12
Q

Male Vs Female Meiosis: Male Commences

A

POOberty

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13
Q

Male Vs Female Meiosis: Female Commences

A

Early Embryonic Life

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14
Q

Male Vs Female Meiosis: Male Duration

A

60-65 days

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15
Q

Male Vs Female Meiosis: Female Duration

A

10-50 yrs (only after complete fertilization)

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16
Q

Male Vs Female Meiosis: Male Gametes/meiosis

A

4 spermatids

17
Q

Male Vs Female Meiosis: Female gametes/meiosis

A

1 ovum and 2 polar bodies

18
Q

Male Vs Female Meiosis: Male Gamete production

A

100-200 million/ejactulate

19
Q

Male Vs Female Meiosis: Female gamete production

A

1 ovum/cycle

20
Q

What is the difference between non-disjunction at MI and MII?

A

MI=HETERSOMY (sisterchromatids separated) and MII=ISODISOMY (sister chromatids did not separate)

21
Q

After meiosis II, the daughter cells have how many chromosomes and how many chromatids?

A

23,23

Genetics (14 decks)

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