中国大学MOOC: 小鼠基因a和b相距40cM,AA BB和 aa bb 小鼠交配，F1代所产生配子(gametes)的基因型和比例为20% Ab and aB, 30% AB and ab。
中国大学MOOC: 小鼠基因a和b相距40cM,AA BB和 aa bb 小鼠交配，F1代所产生配子(gametes)的基因型和比例为20% Ab and aB, 30% AB and ab。
Which of the following does not lead to the formation of aneuploid gametes? A: Failure of homologous pairs to separate at anaphase B: A mutatation in a single gene located on chromosome 2. C: A pair of sex chromosomes that does not separate during anaphase D: A set of sister chromotids that doest not separate during anaphase I
Which of the following does not lead to the formation of aneuploid gametes? A: Failure of homologous pairs to separate at anaphase B: A mutatation in a single gene located on chromosome 2. C: A pair of sex chromosomes that does not separate during anaphase D: A set of sister chromotids that doest not separate during anaphase I
【多选题】A man has genotype A1A2 G1G2. (one each of the A1 and A2 alleles of gene A, one each of the G1 and G2 alleles of gene G ) The A and G loci are on difference chromosomes. What gametes will many meioses produce, in what proportions? A. 1/2 A1A2, 1/2 G1G2 B. 1/4 A1A1, 1/4 A1G1, 1/4 A2G1, 1/4 G1G2 C. 1/4 A1, 1/4 A2, 1/4 G1, 1/4 G2 D. 1/4 A1G1, 1/4 A1/G2, 1/4 A2G1, 1/4 A2G2 E. None of the above F. More information is needed
【多选题】A man has genotype A1A2 G1G2. (one each of the A1 and A2 alleles of gene A, one each of the G1 and G2 alleles of gene G ) The A and G loci are on difference chromosomes. What gametes will many meioses produce, in what proportions? A. 1/2 A1A2, 1/2 G1G2 B. 1/4 A1A1, 1/4 A1G1, 1/4 A2G1, 1/4 G1G2 C. 1/4 A1, 1/4 A2, 1/4 G1, 1/4 G2 D. 1/4 A1G1, 1/4 A1/G2, 1/4 A2G1, 1/4 A2G2 E. None of the above F. More information is needed