Genetics and Heredity

How many chromosomes can be found in a normal human body?

• 55

• 86

• 46

• 23

What is Mendel's first law of genetics and heredity, and what does it mean?

• The Law of Segregation - every living organism has two alleles of each gene, and when gametes are created, the alleles separate.

• Punnet Squares - It means before doing anything with science, you must calculate the square root of 50.

• The Law Of Independent Assortement - Sort genes into the correct chromosome independently.

• Gregor Mendel - Gregor Mendel was commonly known as the father or Genetics.

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What is heredity?

• Heredity is the passing on of certain characteristics or traits from parents to offsrping.

• Heredity is Gregor Mendel's favorite food, which became very popular around the 1800s.

• Heredity is the scientific word for a hybrid.

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What is genetics?

• The scientific study of heredity.

• Genetics is how Gregor Mendel proved that DNA IS the chromosome, not part of it.

• The study of cells.

• The study of rocks.

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WHat does "true-breeding" mean in genetics?

• It means the genotype is homozygous dominant (TT) or homozygous recessive (tt).

• It means the F1 generation is only female, and the F2 generation is only male.

• It means that the genotype is heterozygous (Tt).

• It means the couple will have a child which looks exactly like the father.

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Brandon is homozygous dominant for brown eyes. He marries a girl named Shelly, who is homozygous recessive for blue eyes. If brown eyes are dominant, and blue eyes are recessive, what will their children look like?

• All their children will have blue eyes outlined with brown.

• All their children wil have brown eyes.

• All their children will have blue eyes.

• Their children will have hazel eyes.

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What are genotypes?

• The allele combination for a trait (Ex; Tt, TT, tt)

• The physical appearance of an organism (Ex; short, tall)

• They are another word for chromosomes.

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What is Mendel's 2nd law of heredity?

• Law of Independent Assortment - genes for different traits and inherited independently of eachother.

• Law of Segregation - Genotypes always code for a person to be tall.

• Law Of Genderous - A female has the 23rd chromosome XX and males have XY, though in some genetic disorders, it can end up as X for a female or XXY for a male.

Answer explanation

It is the Law of Independent Assortment. Different genes are inherited independlty of eachother, which means that if you are short, you don't NECCESSARILY have blue eyes. For example, pretend you inherit the "short" trait from your mother, but you do not inherit the "blue eyes" trait from her. That is because these genes are inherited independtly from eachother, or ASSORTED INDEPENDENTLY.

What are the nitrogen bases that form DNA?

• Adenine, Thymine, Hydrocortisone, Cellular respiration.

• Adenine, Thymine, Cytosine, Guanine.

• Adrenaline, Cytosine.

• Nucleus, Guanine.

• Sugar, Glucose, Fructose.

What is the backbone of DNA?

• A sugar phosphate backbone.

• A adenine phosphate backbone.