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Inheritance Answer

The document consists of a series of questions and answers related to genetics, including topics such as inheritance, DNA structure, and blood types. It covers monohybrid and dihybrid crosses, as well as the characteristics of alleles and gametes. The answers are marked with points indicating the correctness of each response.

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cherasptpt
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69 views3 pages

Inheritance Answer

The document consists of a series of questions and answers related to genetics, including topics such as inheritance, DNA structure, and blood types. It covers monohybrid and dihybrid crosses, as well as the characteristics of alleles and gametes. The answers are marked with points indicating the correctness of each response.

Uploaded by

cherasptpt
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOC, PDF, TXT or read online on Scribd
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Question Answer Mark Remark

No.
1a A) Height 1
B) seed texture 1
C) green/ yellow 1
D) yellow/ green 1
bi The transfer of characteristics from one generation to
another. 1
b ii The basic unit of inheritance found on a chromosome 1
c A segment of the polynucleotide chain in a DNA
molecule. 1
d
1 – correct
pairing
A T Ribose sugar

1–
phosphate
Phosphate group
group

C G 1 – ribose
sugar

1-
T A bonding

Total = 4

e i) B ii) O 1

iii)dominant/ co-dominant iv) dominant/ co- 1


dominant

v) AO vi) BO vii) OO 1

viii) Heterozygot ix) Heterozygot x) Homozygot 1

xi) A xii) B xiii) O 1


Total = 5
fi an antigen in his red blood cells called the Rhesus 1
factor.

f ii Rh-negative / Rh – 1
f iii It will form an agglutinate of red blood cells when it
reacts with his antibodies 1
f iv Dominant: Rh-positive allele (Rh) 1
Recessive: Rh-negative allele (rh) 1
2ai Monohybrid: the study of the inheritance of one trait
only 1
a ii Dihybrid: the study of how 2 different traits in the same
species are inherited. 1
a iii Generation 1 : one allele from homozygote dominant
parent and one allele from recessive parent 1
combined to form a pair of allele in F1. 1
F1 is heterozygote 1
b
T tg
G 2

1
TtGg

TtGg TtGg 1

9 : tall and green colour pea


3 : tall and yellow colour pea 4
3 : dwarf and green colour pea
1 : dwarf and yellow colour pea

bi 9:3:3:1 1
b ii Gametes TG Tg tG tg
TG TTGG TTGg TtGG TtGg
Tg TTGg TTgg TtGg Ttgg
tG TtGG TtGg ttGG ttGg
tg TtGg Ttgg ttGg ttgg 4

c i) 44 ( 22 pairs) ii) 44 1
iii) 2 iv) 2 1
v) XY vi) XX 1
vii) 46 viii) 46 1
i)
d XXC 1
ii) normal (carrier) 1
iii) XY 1
iv) normal 1

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