Which of the following is the excepted phenotypic proportions in the progeny of
ID: 167268 • Letter: W
Question
Which of the following is the excepted phenotypic proportions in the progeny of the cross conducted with the F1 offspring? 3 red and long flower petals: 1 cream and short flower petals 9 cream and short flower petals" 3 red and short flower petals: 3 cream and long flower pearls: 1 red and long flower petals 1 red and long flower petals: 1 red and short flower petals: 1 cream and long flower petals: 1 cream and short flower petals 9 red and long flower petals: 3 red and short flower petals: 3 cream and long flower petals: 1 cream and short flower petals. in both sexes of ALL species, gametes are formed via Meiosis. True False Tabard has classic hemophilia, an X-linked recessive disease. Tabard could have inherited the allele for this disease from which of the following persons? his mother's mother his mother's father his father's mother A and B A, B, and C Chromosomal nondisjunction can occur _. in Anaphase of Meiosis I i anaphase of Meiosis II in Anaphase of Mitosis A and B only A, B, and C the underlying basis of silencing of genes via genomic imprinting is _ deletion of the DNA hydroxylation of the DNA deamination of the DNA methylation of the DNA carboxylation of the DNA If a trait is mostly determine by environment and not genetic factors, then in adoptive studies adoptees should resemble their biological parents _ their adoptive parents for this trait. more than less than the same asExplanation / Answer
15. D ( 9:3:3:1 is the Mendelian dihybrid phenotypic ratio for cross between F1 offsprings)
16. B (false) as in few haploid species gametes are formed by mitosis and meiosis occurs in zygote.
17. D ( all of above) it is a X linked recessive disorder and can be inherited through a X chromosome of father or mother or ancestor
18. A (in Anaphase of meiosis 1) as in Anaphase 1 homologous chromosomes separate. Failure of separation of homologous chromosomes is called non disjunction.
19.D (methylation of DNA) heterochromatin (inactive DNA) is methylated.
20. B ( less than) Adoptive studies are done to study effect of environment and genetics on behaviour. It is usually done with twins.
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