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maksim [4K]
3 years ago
8

Can someone help me !!

Biology
1 answer:
STatiana [176]3 years ago
6 0

Answer:

do it ur self stop being lazy dang

Explanation:

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If someone with auburn hair has children with someone with red hair (but whose mother had black hair ) what are the genotype and
tensa zangetsu [6.8K]

The phenotype is - 75 % red and 25 %brown.

The genotype is hRhR - 25%

hBkhR - 50%

hBrhBk - 25%.

<h3><u>Explanation:</u></h3>

The cross given here is a simple dominant - recessive relationship between the three types of alleles of hair colour. The genes of this characteristics are present in autosomes, so will be segregated equally among all the sexes of the offsprings.

Now the genotype of auburn and red with black mother is given. So during gametogenesis, the gametes from the parents will be

Father - hBr and hR

Mother - hBk and hR

So, the probable combinations are hBrhBk, hBrhR and hBkhR.

The frequency of the combinations are 25%, 25% and 50% respectively.

The phenotypic ratio will be red : brown as 3:1.

6 0
3 years ago
State one way in which bacteria and archaea are different and one way in which they are the same.
Maksim231197 [3]
<span>Archaebacteria is usually found in extreme environments and eubacteria is not found in environments. Also, eubacteria cell walls contain peptidoyclan. They are both prokaryotic cells.

Hope this helps!

-Payshence xoxo</span>
4 0
3 years ago
Trisomy 21 can be caused by nondisjunction of chromosome 21, or by inheriting a Robertsonian fusion of chromosome 21 attached to
OLga [1]

Answer:

6 in total; 3 viable and 3 non-viable

Explanation:

Robertsonian translocation is one of the types of structural alteration in chromosomes, in other words, a rearrangement between chromosomes, which can occur between five pairs of acrocentric chromosomes (chromosomes with the centromere close to the end of one of the "arms"): 13, 14, 15, 21 and 22.

An individual who has Robertson's translocation between chromosomes 14 and 21 generally has only 45 chromosomes.

In addition, a carrier of this type of translocation can theoretically produce 6 types of gametes, however 3 of them are not viable.

As for the three remaining gametes: One is normal, and among the other two, one is balanced and the last is unbalanced.

So, theoretically, when combining a normal gamete, the probability of a child with down syndrome being born through these conditions is 1/3 (considering that the probability of producing a certain type of gamete is equal for the three types).

3 0
3 years ago
I need help on this
just olya [345]

Answer:

1. energy

2. potential energy

3.kinetic energy

4. mechanical energy

5. b

Explanation:

7 0
3 years ago
Tobacco mosaic virus (TMV) has been found in virtually all commercial tobacco products. Why, then, is TMV infection not an addit
Georgia [21]
TMV is not an additional hazard for smokers because the humans are not within the range of hosts of the TMV virus and so the humans cannot be infected. The Tobacco Mosaic Virus is actually a single stranded RNA virus that infects a wide variety of plants and especially the tobacco plants. The main signal is the discoloration of the leaves of the plants.
4 0
3 years ago
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