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.
Enzymes are proteins, and proteins are basically a large chain of amino acids (polymer). So imagine when the chain is clumped into a 3D thing (see picture), it is slightly elastic (since there are spaces) and can have a bit of movement for the substrate to fit in. However, the shape is specific as it will return back to its original position once the substrate has left. Just imagine a silicone cup, when you stretch it a bit to fit a slightly larger ball in, it expands a little. When u remove the ball, it returns to its original shape. Similarly, the enzyme active site will return to its original shape but can be slightly molded for a short while, and that is what the sentence meant. It’s quite hard to explain without an actual model/ video, so if you don’t understand you can comment below!
Answer:
Only plants with perfect flowers are capable of self-fertilization.
Explanation:
Self-pollination is the process that allows plants to fertilize themselves. This process is very beneficial when a plantation has plants with few flowers or when the plants are spaced far apart.
However, only plants with perfect flowers can self-fertilize. This is because for self-fertilization to occur, the plant needs to have flowers that present the male and female reproductive organs, which allows the same flower to produce pollen that will be sent to its own ovary. Only perfect flowers have male and female reproductive organs at the same time.
Answer:
A pure substance containing only one kind of ( atom )
Explanation:
Since it is one atom it is an element. An element is a pure substance that cannot be separated into two materials unlike a compound. This makes the substance pure. Like melting or cutting a gold bar into gold nuggets. It's still gold but it isn't the same shape but same density.
Hope this helps
- massmaster34
The answer is C.) A single Gene can only influence a single trait