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TLS Online TPP Program

#Question id: 7228

Why do Drosophila wings develop in only one particular thoracic segment, legs in all three, and antennae on the head? Which of the following answer is correct?

#Unit 5. Developmental Biology

The types of appendages produced by each segment reflect the identity conferred on that segment by the pattern of Hox gene expression along the antero-posterior axis in the embryo.
The types of appendages produced by each segment reflect the identity conferred on that segment by the pattern of segment polarity gene expression along the antero-posterior axis in the embryo.
The types of appendages produced by each segment reflect the identity conferred on that segment by the pattern of gap gene expression along the dorso-ventral axis in the embryo.
The types of appendages produced by each segment reflect the identity conferred on that segment by the pattern of pair-rule gene expression along the dorso-ventral axis in the embryo.

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TLS Online TPP Program

#Question id: 12163

#Unit 8. Inheritance Biology

A cross is made between the two pure line homozygous plant their height is 6cm and 2cm. the F1 progeny shows 6 cm height. the variations takes place in F2 progeny , which were made by

TLS Online TPP Program

#Question id: 12164

#Unit 8. Inheritance Biology

What is the value of broad sense and narrow sense heritability respectively , if the given values of;

A) dominance genetic variance =0.4 ,

B) genic interaction variance =0.3,

C) additive genetic variance =0.6,

D) environmental variance=0.8,

E) genetic−environmental interaction variance=0.3

TLS Online TPP Program

#Question id: 12165

#Unit 8. Inheritance Biology

If the environmental variance increases and all other variance components remain same , then what will be the effect on heritability?

TLS Online TPP Program

#Question id: 12166

#Unit 8. Inheritance Biology

If cross has made between the plant height 46cm and 10cm , then the F1 progeny shown 28cm . If the of this cross is 3QTL, then how much phenotypes will be formed?

TLS Online TPP Program

#Question id: 12167

#Unit 8. Inheritance Biology

If a cross is made between the two individuals such as,

The F1 shows the 512 individuals, contain the 2 individual shows maximum phenotype.

i) No. of QTLs

ii) No. of polygenes involved

iii) No. of phenotypes in F2 generation

iv) No. of genotypes in F2 generation

Calculate the given different values;

TLS Online TPP Program

#Question id: 12168

#Unit 8. Inheritance Biology

The proportion of the total phenotypic variation that is due to genetic differences is known as