What is the probability that an offspring will have an ss/RR genotype from a cro

Question

What is the probability that an offspring will have an ss/RR genotype from a cross of Ss/Rr individuals?

            A. 6.26%

            B. 3.12%

            C. 12.5%

You are studying a diploid organism that has 14 sets of chromosomes. How many chromosomes will a gamete from this organism have?

            A. 14

            B. 28

            C. 56

The physical structure that is formed when two chromatids cross over is called a(n)_.

            A. synaptonemal complex

            B. Karyotype

            C. chiasma

Explanation / Answer

ans 1 --- 6.26% ------- When we cross between SsRr we get only one genotype with ssRR by punnet square , so the probability for it will be 1/16 * 100 = 6.26 % -- the gametes will be SR Sr sR sr

ans 2 ---- 14 ------- 14 sets means it will have 28 chromosome = so during meiosis it will form a gamete having 14 chromosomes.

ans 3 --- chaisma ---- it is a point where two homologous chromosome , non sister chromatids exchange genetic material during chromosomal cross over during meiosis.

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