Question

QUESTION 6 An organism has 2 pairs of chromosomes 1 and 2. A certain female from this species was found with chromosome 1 has blue gene on one pair and orange gene on the other. Number 2chromosomes both have the short gene. As cells in her ovaries undergo meiosis, which of the following combinations of genes and chromosomes will her eggs have? A) only blue short gene eggs OB) only orange short gene eggs OC) one half blue short and one half orange short gene eggs OD) three fourths blue short and one fourth orange short gene eggs OE) All orange eggs QUESTION 7

Answer 1

6.(C) half of them will be blue short and other will be orange short because during meiosis it is a reduction division. cells will have one chromosome from each pair with equal probability

so as chromosome pair 1 has two different gene on the chromosomes blue and orange and chromosome 2 has short genes

so all of them will be short with half blue and half orange

11.(e) zygote will undergo mitosis (equational division) so each cell will divide to produce 2

so 7 cell division leads to 128 cells

1zygote cell-2-4-8-16-32-64-128

13.(B) cells repoduce only when needed otherwise they are in cell cycle arrest, they are fully functional and they can reenter the cell cycle when needed

cells with DNA damage undergo repair and then enter cell cycle otherwise undergo apoptosis

in apoptosis cells exit the cell cycle and die