Question

2. Crossing over occurs in

	mitosis
	Neither mitosis nor meiosis
	Both mitosis and meiosis
	meiosis

3. Given that E=unattached earlobes and e=attached earlobes what is the phenotype of an individual who is heterozygous for earlobe attachment?

	attached earlobes
	unattached earlobes
	one attached and one unattached earlobe.
	EE

4. Given that E=unattached earlobes and e=attached earlobes, what is the genotype of an individual who is heterozygous for earlobe attachment?

	Unattached earlobe
	ee
	Ee
	EF

5. With regards to X linked recessive disorders, if a woman has the disorder, all of her sons will have it.

	True
	False

6. An individual with a ____ of Aa is said to be heterozygous and would exhibit a dominant ___.

	phenotype; genotype
	genotype; phenotype

7. With regards to autosomal dominanat disorders, two unaffected parents will not have affected children.

	True
	False

8. Oogenesis occurs in the testes.

	True
	False

9. Colorblindness is a X linked recessive trait. Which of the following represents the genotype of a colorblind male?  

	aa
	XaXa
	XAY
	XaY

10. _____ produce(s) 2 diploid cells from every parent cell.

	Mitosis
	Neither mitosis nor meiosis
	Both mitosis and meiosis
	Meiosis

Answer 1

Dear Student answer of your question is given below:

Solution of Q 2: meiosis, In meosis there occurs crossing over which results in variations, it occurs in sexual reproduction.

Solution of Q 3: E=unattached ear lobes, It is considered that unattached ear lobes are dominant.

Solution of Q 4: Ee (heterozygous) is a genotype while as unattached earlobe is a phenotype .

Solution of Q 5: false. As a female has two X chromosomes and in this case she has a recessive disorder so one x chromosome is affected while other is unaffected. It will transfer one x chromosome to one boy and other to another boy so only one will be affected.

Solution of Q 6: genotype ,phenotype

Solution of Q 7: true

Solution of Q 8: False , oogenesis occurs in ovaries i.e in females.

Solution of Q 9: colour blind male will be XaYi.e Option 4

Solution of Q 10: mitosis,

Note : Dear student , we are allowed to do only 4 subparts, i have still done it for youb, please rate my answer as it really matters for us