Please explain. Thanks. (1) The A and B genes are linked. What gametes can be pr
ID: 300673 • Letter: P
Question
Please explain. Thanks.
(1) The A and B genes are linked. What gametes can be produced by the offspring of AAbb and aaBB plants in the absence of recombination?
A) AB, Ab, aB and ab
B) AB and ab
C) AA, bb, aa and BB
D) Ab and aB
E) not enough information
(2) Recombination (crossing over) occurs during __________
A) G1
B) S
C) G2
D) prophase of mitosis
E) prophase of meiosis I
F) metaphase of meiosis I
G) anaphase of meiosis I
H) prophase of meiosis II
I) metaphase of meiosis II
J) anaphase of meiosis II
Explanation / Answer
AAbb And aaBB
Will form only gametes AB about both
Hence option D
Crossing over occurs between prophase 1 and metaphase 1 and is the process where homologous chromosomes pair up with each other and exchange different segments of their genetic material to form recombinant chromosomes. It can also happen during mitotic division, which may result in loss of heterozygosity.
And is option prophase 1 of meiosis 1 and metaphase 1 of meiosis1 and S phase