5. Which offspring could not arise from the parent cells with the chromosomes shown below? Assume crossovers can occur between c
hromosome pairs in the parent cells
Parent 1
Parent 2
Allele key
Dominant
C- Curly wing
B - Brown body
L-Legs on head
R- Red eyes
Recessive
C - normal wing
b - black body
I - antenna
r- orange eyes
The genotype of the parents are CcBbLLRR and CcBbLlRr respectively. Crossing over takes place between 2 non-sister chomatids. After crossing over between the parents there are possibilities of forming 3 types of offsprings as depicted in the above image: ccBbLlRr, CcBBLlRR and ccbbLLRr. The offspring B with heterozygous condition for eye colour will have Rr genes. R- red colour is the dominant color over orange color.
The organism has haploid gametes. Human sex cells (egg and sperm cells) contain a single set of each chromosome, making them haploid. During fertilization, the organism acquires a set of chromosomes from each parent, making it a diploid (two sets of each chromosome) zygote.
