I found the exercise on the internet and attached is the representation of the fly's trisomy.
Correct answer:
<span>"Nondisjunction occurred in the male parent at the meiosis I division to produce an (n+1) sperm that fused with a normal (n) egg."
It is during meiosis I that the homologous chromosomes are divided into two new cells. In this case, if a trisomy is present, it means that during this segregation part during meiosis I, two homologous chromosomes were not separated (n</span>ondisjunction)<span> creating a gamete cell that had two copies of a chromosome (and another without any copy of that chromosome).
This error on meiosis I might have occurred in the male parent. As we can see from the schematic representation of the trisomy, there is two chromosomes with a wild allele (+). These alleles were only present in the male parent, as the female parent was homozygous for all genes, no wild allele (+).</span>
Answer:
decreased variation within a species
Answer: It is A
Explanation: C and D are jokes/ complete lies. B is wrong because Darwin did observe that animals and plants adapted (evolved) to suit their environments.
Answer:
A I'm doing it on edge now
Explanation:
Although most of these organisms are motile (moving), they cannot swim or move against currents, but they can move vertically in the water column. Many marine plankton are found in the deep waters of the outer ocean, or pelagic waters, whereas others are found in the shallow waters known as the neritic zone.
Answer:
1. Mother: TtRr Father: TtRr
2. RT, Rt, rT, rt
4. Possible combinations: RRTT, RRTt, RRtt, RrTT, Rrtt, RrTt, rrtt, rrTT, rrTt
(combine them on the chart, for example, the first one on the left would be RRTT)
5. 9:3:3:1
Explanation: