All Biology +2 Examples

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199 Terms

1
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30 minutes pollen viability
rice, wheat
2
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months pollen viability
leguminoseae, rosaceae
3
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syncarpous
papaver
4
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apocarpous
michelia
5
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monoecy i.e. male and female flowers on same plant
maize, castor
6
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dioecy i.e. male and female flowers on different plants
papaya
7
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flowers with both chasmogamous and cleistogamous flowers
commelina, oxalis, viola
8
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tallest flower
Amorphophallus
9
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large inflorescence for anemophilly
corn cob
10
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pollen at 2 cell stage percent
60
11
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how many species hydrophilly
30
12
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aquatic plants with anemophilly
water lily, water hyacinth
13
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wind pollination common in
grasses
14
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surface of water pollination
vallisneria, hydrilla (fresh water)
15
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submerged pollination
seagrasses like zostera (marine)
16
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most common biotic pollinator
bees
17
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endosperm consumed in
pea, groundnut, beans
18
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persistent endosperm
castor, coconut, wheat, maize, barley
19
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scutellum
grass
20
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non albuminous seeds
pea, groundnut, beans
21
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albuminous seeds
coconut, castor, wheat, maize, barley
22
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perisperm/ persistent nucellus
black pepper, beet
23
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how much water in seeds
10 to 15 percent
24
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fleshy fruits
apple, guava, mango orange
25
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dry fruits
groundnut, mustard
26
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thalamic fruits
cashew, apple, strawberry
27
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oldest seed
lupinus arcticus from arctic tundra
28
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nucellar cells form embryo
citrus, mango
29
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length of testis
4-5 cm
30
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width of testis
2-3 cm
31
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length of ovaries
2-4 cm
32
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fallopian tube length
10-12 cm
33
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lobules per testis
250
34
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seminiferous tubules per lobule
2 to 3
35
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mammary lobes per breast
15 to 20
36
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sperms per coitus
200 million
37
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normal shape sperms
60 percent
38
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vigorous motility sperms
40 percent
39
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primary follicles per ovary
60,000 to 80,000
40
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apomixis
asteraceae, grasses
41
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family planning initiated in
1951
42
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RCH
reproductive and child health care
43
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how many varieties chosen by mendel
14
44
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Punnett square by
reginald c punnett
45
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incomplete dominance example
flower color in dog flower (antirrhinum/ snapdragon)
46
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codominance example
blood group
47
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number of genotypes, phenotypes of blood group
6, 3
48
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multiple allele example
blood group
49
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rediscovered mendel's work
de vries, correns, von tschermak
50
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noticed chromosome behaviour was parallel to genes
sutton, boveri
51
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chromosomal theory of inheritance given by
sutton
52
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drosophilla completes life cycle in
2 weeks
53
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thomas hunt morgan worked on
drosophilla melanogaster
54
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linkage discovered by
thomas hunt morgan
55
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who did morgan cross
yellow-bodied, white-eyed females to brown-bodied, red-eyed males
56
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recombination in white and yellow
1.3 percent
57
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recombination in white and miniature wing
37.2 percent
58
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mapped chromosome linkage
albert strutevant
59
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polygenic
skin color
60
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pleiotropic
phenylketonuria, starch synthesis in peas
61
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discovered x chromosome, called it x factor
henking
62
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XO Type of sex determination
grasshopper
63
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females have ZW in
poultry
64
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chromosomal aberraations common in
cancer cells
65
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phenylketonurea causes mutation in which enzyme
phenyl alanine hydroxylase
66
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symptoms of phenylketonurea
mental retardation, reduction in hair, skin pigmentation
67
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haemophilia
x linked recessive
68
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Myotonic dystophy
autosomal dominant
69
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sickle cell anaemia
autosomal recessive
70
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color blindness
x linked recessive
71
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sickle cell anaemia caused due to
replacement of glutamic acid by valine on 6th position of beta chain of haemoglobin
72
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phenylketonuria
autosomal recessive
73
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phenylketonuria cause
lack of enzyme that converts phenlalanine to tyrosine which causes phenyalanine accumulation as phenylpyruvic acid
74
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thalassemia
autosomal recessive
75
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thalasemia cause
reduced formation of one of the chains of haemoglobin
76
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on which chromosome are hba1, hba2 responsible for alpha thalassemia
16
77
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beta thalassemia with hba2 responsible for chromosome
11
78
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downs syndrome due to
extra copy of chromosome 21
79
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turners syndrome due to
loss of an x chromosome
80
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klinefelter syndrome due to
extra x chromosome
81
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human dna nucleotides
3.3* 10^9
82
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phi 174 nucleotides
5386
83
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bacteriophage lambda nucleotides
48502
84
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e coli nucleotides
4.6 * 10^6
85
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nuclein by
fredrich meischer
86
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watson and crick based on data by
franklin, wilkins
87
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one turn length
3.4 nm
88
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distance between 2 bp
0.34 nm
89
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central dogma given by
francis crick
90
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bp in a nucleosome
200
91
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transforming principle
fredrick griffith, streptococcus pneumoniae
92
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unequivocal proof
hershey, chase
93
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biochem characterization of transforming principle
avery, mc leod, mc carty
94
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semiconsevative replication model
meselson, stahl
95
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e coli divides in how much time
20 minutes
96
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radioactive thymidine in vicia faba
taylor et al
97
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codons theorised by
gamow
98
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proof of codons existence
hargobind khorana
99
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cell free system for protein synthesis
nirenberg
100
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rna in template independent manner using
severo ochoa enzyme- polynucleotide phosphate