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.
All microscopes have lenses. Some types of lenses are eyepiece lenses, objective lenses, and condenser lenses.
Answer AND Explanation:
<u>FACTORS THAT CAUSE GENETIC VARIATIONS</u>
- Crossing over. At the chiasmata during prophase I of meiosis, breakage may occur and exchange of genetic information may take place. New gene combinations which result in variations.
- Independent assortment. The arrangement of homologous chromosomes at the equator of the spindle during metaphase of the first meiotic division is random. These homologous chromosomes segregate into different daughter cells which contain different genetic combinations which brings about variation
- Fertilisation permits parental genes to be brought together in different combinations. This is the cause of variations in members of the same family.
- Mutation is the spontaneous change in the genetic makeup of an organism. These changes may be inherited by the offspring therefore beginning variation.
Answer: One thing that is NOT true that concerns conifers is <u>they have motile sperm. </u>
Explanation:
Conifers are a seed plant. They are usually trees that bear cones and they have vascular tissues. They are classified as gymnosperms. The living confers are all woody plants.
The trees that are conifers are;
- Junipers
- Cedars
- Cypresses
- Firs
- Kauris
- Redwoods
- Spruces
- Yews
The colors of these conifers vary and include colors such as rainbow, bronze, yellow, blue, and red.
False. <span>Breaking Bonds → Energy Absorbed
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You have to put energy into a molecule to break its chemical bonds. The amount needed is called the<span> bond energy</span><span>. If you think about it, molecules don't spontaneously break.
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