Cytogenetics Practice Test 9

1. In case of summer squash, the W locus shows dominant epistasis over the Y locus. W locus develop white colour while /- give yellow and y/y gives green. If you cross a yellow and a green summer squash you can’t get______________

2. You crossed two heart shaped Shepherd’s purse which is heterozygous at one locus and homozygous recessive at other gene locus, what would be the ratio of heart shaped and narrow in F1?

3. Which of the following condition in recessive duplicate epistasis will give the odd phenotype?

4. Which of the following is true wrong about ABO blood group?

5. If a Drosophila is having XXY sex chromosomal combination with one X bearing white allele for eye colour and another X having eosin allele for eye colour, what would be its phenotype?

6. Which of the following is not true for yellow mice?

7. The genes that Mendel worked with were__________________

8. If a mother has blood group O and father has blood group A, the child being type AB, which of the following is wrong?

9. In case of dominant epistasis which of the following will have the same expression, when A is the epistatic locus?

10. When the specific non-imprint gene from the chromosome 15 of the mother s missing it leads to _________________