#Question id: 29101
#Unit 8. Inheritance Biology
A cross between two yellow heterozygous mice produces an initial genotypic ratio of 1/4 YY, 1/2 Yy, and 1/4 yy, the F1 progeny showing lethality in their ratio, if F1 yellow heterozygous mate with nonyellow mice what will be the ratio in F2 generation?
#Question id: 29102
#Unit 8. Inheritance Biology
In mice Igf2 gene which encodes a protein called insulin like growth factor II (Igf2). Offspring inherit one Igf2 allele from their mother and one from their father The paternal copy of Igf2 is actively expressed in the fetus, but the maternal copy is not expressed. which of the following is correct about this gene?
a) this is an example of genomic imprinting and showing maternal imprinted
b) this is an example of genomic imprinting and showing paternal imprinted
c) mechanism of imprinting is due to the addition of methyl (CH3) groups to DNA nucleotides
d) mechanism of imprinting is due to changing the nucleotide sequences
#Question id: 29103
#Unit 8. Inheritance Biology
Which of the following is a correct prediction about Anaphase?
#Question id: 29104
#Unit 8. Inheritance Biology
#Question id: 29105
#Unit 8. Inheritance Biology
If two set of chromosome is considered in G1 phase, then at which phase of the cell cycle, the no of chromosome as well as no of DNA cell both are doubled?
#Question id: 29106
#Unit 8. Inheritance Biology
For the proper segregation of the chromosome at anaphase-I chiasma formation take place. At which stage of the cell cycle crossing over takes place?