Multiple Choice Questions 1. The is responsible for the separation of the chromo

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Multiple Choice Questions 1. The is responsible for the separation of the chromosomes dur a) cell wall; anaphase b) flagellum; metaphase c) mitotic spindle; anaphase d) kinetochore; prophase e) centromere; telophase of mitosis. contain identical DNA sequences and are held together byduring mitosis a) Daughter chromosomes; hydrogen bonding b) Daughter chromosomes; ionic bonding c) Sister chromatids; spindle fibers d) Sister chromosomes; histone proteins e) Sister chromatids; centromere 3. Cell division is represented in the above Figure by the letter a) A. b) B c) C d) D. 4. To identify the genotype of yellow-seeded pea plants as either homozygous dominant (Y) or heterozygous (Yy), you could do a test cross with plants of genotype a) y b) yy c) YY d) Yy 5. When true-breeding tall stem pea plants are crossed with true-breeding short stem pea plants, all of the_plants, and 3/4 of theplants had tall stems Therefore, tall stems are dominant. a) F1, F2 b) G1, G2 c) Parental, F2 d) F2, Parental

Explanation / Answer

1- spindle fibers are attached to the centromere of the chromosome and pull apart the chromatids during the anaphase of the mitosis.

So the answer is option E.

2- Duplication of chromosome takes place during the S phase of cell division. As soon as the chromosomes are duplicated the sister chromatid are attached to themselves by the centromere.

So answer is option E

3- In the given figure A, B and C is interphase during which cell prepares itself for cell division. D is the actual phase where cell division takes place.

So the answer is option D.

4- In order to find out the genotype of heterozygous individual we need to cross it with the individual which both the recessive alleles. This cross is called a test cross.

So the answer is option B- yy

5- It is a monohybrid cross where only one gene takes part in the cross.

In monohybrid cross of homozygous recessive and homozygous dominant F1 generation all the prognosis shoes the dominant character and F2 generation, the ratio of dominant: recessive is 3:1

So answer is option A- F1, F2

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