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Ahat [919]
3 years ago
11

Why there are more cells observed in mitosis in the root tip of a plant than in the woody stem of a plant.

Biology
1 answer:
Aneli [31]3 years ago
6 0

Answer:

Cell growth increases cell size, while cell division (mitosis) increases the number of cells. As plant cells grow, they also become specialized into different cell types through cellular differentiation. Once cells differentiate, they can no longer divide.

Explanation:

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o-na [289]
The average annual temperature of Austin TX is 68.5 F
4 0
3 years ago
Suppose that one of the normal children from Part B and one of the albino children from Part C become the parents of eight offsp
Aleks [24]

Full question from alternative source:

Albinism in humans is inherited as a simple recessive trait. for the following families, determine the most likely genotypes of the parents

Part A

Two normal parents have five children, four normal and one albino. What are the most likely genotypes of the parents?

Part B

A normal male and an albino female have six children, all normal. What is the most likely genotypes of the parents?

Part C

A normal male and an albino female have six children, three normal and three albino. What are the most likely genotypes of the parents?

Part D

Suppose that one of the normal children from Part B and one of the albino children from Part C become the parents of 8 offspring. What would be the expected number of normal and albino offspring?

Answer:

Part A - both heterozygous for the trait (Aa)

Part B - female aa, male likely AA

Part C - female aa, male Aa

Part D - 4 normal, 4 albino (50:50)

Explanation:

Part A

We are told that albinism is a recessive trait. Lets call it a and the normal allele A. Since neither of the parents have it, that must mean they each possess at least one copy of the dominant allele (either AA or Aa). Most of their children are normal, but 1 is albino. The albino child must have inherited two copies of the a allele, one from each parent. This means each parent must possess an a allele and must both be Aa.

Part B

Since the trait is recessive, we already know that the albino female must have the genotype aa. If her husband in homozygous normal (AA), all their children will be heterozygous (Aa), and therefore normal, which is the case in this cross. Therefore aa and AA are the most likely genotypes. However, it is still possible that the male has the genotype Aa. This would mean they had a 50:50 chance of producing an albino offspring. We know they have six normal children, so this is unlikely.

Part C

Since the trait is recessive, we know the female has the genotype aa. Unlike the last family, this family has some albino children. This means that the husband must be a carrier of the trait, but he is unaffected, so must be Aa.

As described in part B, if he is Aa and she is aa, they will have 50:50 normal:albino children. This is the ratio in this family.

Part D

The normal children from Part B are all heterozygous for the trait (Aa), inheriting one normal allele from their father, and one albino allele from their mother. The albino children from part C are all aa. Therefore, the cross is Aa x aa. We can draw a punnett square:

                  Aa

             A         a

       a   Aa       aa

aa   a   Aa       aa

Half the children have the genotype Aa, and half have the genotype aa. That means half will be normal and half will be albino. Therefore, 4 normal, 4 albino.

4 0
3 years ago
If you could bioengineer one change to sharks to make them even better and more adapted to their environment and lifestyle what
nadya68 [22]
Maybe that if they stop swimming they won’t die? Not sure if that’s helpful but it’s a suggestion. Here’s a link about sharks-https://g.co/kgs/jVvFkF
7 0
3 years ago
Why are some pots and pans designed with wooden handles?
Angelina_Jolie [31]
Hello,

Your brainliest answer would be:

Wood is an insulator.

Plz mark me brainliest!

Hope this helps!
8 0
3 years ago
Read 2 more answers
How did early astronomers use constellations​
zheka24 [161]

Answer:

Ancient sailors used stars and constellations to guide their travels. Polynesians, for example, sailed among the Pacific Ocean islands by watching stars. To explain why planets seemed to change direction, Ptolemy used old calculations by Hipparchus to understand planetary motion.

Explanation:

Brainliest pls

3 0
2 years ago
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