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Campbell NCERT > Sexual Life Cycles > Flashcards

Sexual Life Cycles Flashcards

1
Q

No.of chromosome in dorsophila

A

4 sets of chromosome

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2
Q

To study karyotype of somatic cells, cells are treated with to stimulate mitosis

A

Drugs

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3
Q

Different homologs can be distinguished from one another by seeing

A

Centromere position, size and pattern of color bands produced after dying with chromatin-binding dye

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4
Q

No. Of chromosome in dogs

A

39 set

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5
Q

Gametophyte is haploid or diploid

A

Haploid

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6
Q

Sporophyte is

A

Diploid

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7
Q

Alternation of generation is seen

A

in plants and some algae

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8
Q

In which type of organisms haploid is the only multicellular stage

A

Fungi, some protists and some algae

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9
Q

In plant cells during cytokinesis —— is formed

A

Cell plate

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10
Q

Sister chromatids are held together by

A

Cohesins

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11
Q

Mating between two true breeding breeds

A

Hybridization

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12
Q

Example of CODOMINANCE

A

MN blood grouping

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13
Q

Tay Sachs disease about

A

Brain unable to metaboloize certain lipid due to the absence of certain enzyme

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14
Q

In Tay Sachs heterozygous at organism level of dominance

A

Complete

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15
Q

Multiple allele eg

A

ABO BLOOD GROUP

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16
Q

Dominant alleles are more in no. In a population TRUE/FALSE

A

False

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17
Q

When one gene define more than one traits

A

Pleiotropy

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18
Q

When one gene effects the whether other gene would be expressed or not

A

Epistasis

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19
Q

When one gene effects the whether other gene would be expressed or not

A

Epistasis

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20
Q

Traits vary in a continuum

A

Quantative characters

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21
Q

In disease where there is high intracellular Cl concentration due to a abnormal membrane protien

A

Cystic fibrosis

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22
Q

Dominant disease leading to dwarfism

A

Achondroplasia

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23
Q

Lethal disease provide symptoms at mid 40s lead to deterioration of nervous system

A

Huntington disease

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24
Q

Multi factorial disorder

A

Heart, diabetes, cancer, schizophrenia, alcholism, bipolar

25
Q

Foetus tests in which fetal dna in mother’s blood is tested(cell free DNA

A

Cell free DNA Tests

26
Q

Disease in which newborn can’t metaboloize phenylalanine

A

PKU

27
Q

Sex signs begin in embryo after —– of fertilization

A

2 months

28
Q

Gene at Y chromosome that leads to development of testes

A

SRY gene

29
Q

Autosome gene required for ovaries development

A

WNT4

30
Q

X linked disease leading to loss of muscle coordination

A

Duchenne muscular dystrophy

31
Q

X linked disease leading to absence of protein required for clotting

A

Hemophilia

32
Q

X gene that lead to formation of Barr body

A

XIST gene

33
Q

Max recombination frequency

A

50%

34
Q

Banans are

A

Triploid

35
Q

Wheat are

A

Hexaploid

36
Q

Strawberry are

A

Octoploid

37
Q

Four ways of chromosome structure alternation

A

Duplication, deletion, translocation, inversion

38
Q

Down syndrome

A

Trisomy 21

39
Q

Abnormal chromosome

A

Aneuploidy

40
Q

Knilefelter syndrome

A

XXY

41
Q

Turner’s syndrome

A

X

42
Q

Replication of chromosomal dna begins with

A

Origins of replication

43
Q

Enzyme untwist dna near replication fork

A

Helicases

44
Q

Enzyme relieve strain due to helicases

A

Topoimerase

45
Q

E coli. Has —- no . Of origins of replication

A

1

46
Q

Direction of replication

A

5’ –> 3’

47
Q

Enzyme adds primer to DNA strand

A

Primase

48
Q

Enzyme adds neuclotides to DNA strand

A

DNA POL III

49
Q

Replace primer to DNA neucleotodes

A

DNA POL I

50
Q

Join replace DNA neuclotide to already one

A

DNA LIGASE

51
Q

System helps to repair dna

A

Nuclear excision system

52
Q

In eukaryotic cells chromosomal ends called

A

Telomeres

53
Q

Code in telomere

A

Ttaggg

54
Q

Enzyme lengthens telomere in Germany cells

A

Telomerase

55
Q

Telomere act as

A

Buffer

56
Q

Which protein first condense the dna

A

Condensin II

57
Q

Which protein secondly condense the dna

A

Condensin I

58
Q

Bead of dna

A

Nucleosome

59
Q

DNA between two nucleosome

A

DNA linker

Campbell NCERT (3 decks)

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