Explanation:
Chromosomal crossover, or crossing over, is the exchange of genetic material during sexual reproduction between two homologous chromosomes' non-sister chromatids that results in recombinant chromosomes. ... Crossing over is described, in theory, by Thomas Hunt Morgan.
Literally just had a test on this today :)
1 is correct.
2 is correct.
3: does true breeding like a purebred/homozygous/two of the same traits?
if so, all of the plants will show the dominant allele, so the answer is B
4 is correct.
5: 23 because when they combine, the chromosomes mix, and there are 46 in a regular cell. Half com from one parent, and half from the other, so the answer is A
6: homo is a prefix that means “same”, and zygous has something to do with genes, so the answer is homozygous
7 is correct
8 is correct
9: i have a strange felling that it is alleles, but DNA could also work, so I’m not quite sure on this one, sorry…
10: alleles are the different forms of a gene. Genes are transferred to you from your parents hereditarily. An allele for stem height would be T or t, but a gene would be TT, Tt, or tt.
I really hope this helps you! It was a hard unit for me, but i did get 100% on the test, and I’m sure you can too.
Answer:
The correct answer is - neurulation
Explanation:
The neural groove is a groove of the neural plate which is a thick plate that is enclosed by the neural folds of an embryo. The neural grove forms the neural tube which expands and develops into the spinal cord and brain.
The development of the neural grove is taken place during the process known as neurulation which is characterized by all characteristic development related to the neural groove and ventricular system.
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